Log Cabin Scrap Blanket: A Free Knitting Pattern for Using Up Every Last Bit of Yarn

If you’ve been knitting for any length of time, you know the feeling. You open a drawer, a basket, or a dedicated yarn cabinet and find yourself staring at a mountain of leftover skeins — some barely touched, some down to their final yards, all of them too beautiful to throw away and too small to justify a full project. The log cabin scrap blanket is the answer to every yarn hoarder’s prayer, and today I’m sharing a complete free knitting pattern so you can dive in immediately.

This project is endlessly adaptable. You can make it baby-sized, lap-sized, or a generous throw that drapes over a sofa. You can use worsted weight throughout, or mix weights and let the texture become part of the design. You can stick to a careful color palette or throw caution to the wind and celebrate every cheerful contradiction in your stash. The log cabin construction method means there are no rules strict enough to ruin this project, and that’s exactly what makes it so satisfying to knit.

What Is a Log Cabin Blanket?

The log cabin construction method takes its name from the classic quilting block of the same name. In quilting, a log cabin block is built by sewing strips of fabric around a central square, adding each new strip perpendicular to the previous one and working outward in a spiral. In knitting, the idea is identical in spirit but executed with needles instead of a sewing machine. You pick up stitches along the edge of a previously knitted section and work back and forth in rows to build a new “log,” or strip, directly onto the existing fabric.

The result is a seamless, unified piece of fabric that looks deliberately planned even when it’s completely improvised. Because each new section is picked up from the last, the whole blanket grows organically without any sewing or assembly at the end. That means no finishing dread, no weaving in of seams, and no wondering whether your mattress stitch is visible on the right side.

Why Scrap Yarn Is Perfect for This Project

Most blanket patterns ask you to commit to a single yarn from start to finish, which means buying multiple skeins of the same dye lot and hoping for the best if you run out. The log cabin structure turns that constraint upside down. Each strip is a self-contained unit, so you can end a color whenever your yarn runs out and begin a new one at the start of the next section. Short on a particular color? No problem — use it for a narrow strip and save the wider strips for yarns you have more of.

Working with scrap yarn also forces you to make bold color decisions you might not otherwise make. When you’re buying yarn intentionally for a project, it’s easy to play it safe. But when you’re pulling from a stash built up over years, you end up pairing colors in ways that surprise you, and those unexpected combinations are often the most striking. A dusty pink sitting next to a deep forest green, a warm mustard abutting a cool slate blue — these pairings emerge from necessity and end up looking like they were chosen by a professional colorist.

Materials You’ll Need

Before we get into the pattern itself, let’s talk about what you’ll need to gather.

Yarn: This pattern is written for worsted weight yarn (approximately 200 yards per 100g), but you can use any weight as long as you adjust your needle size accordingly and stay consistent enough that the blanket lies flat. A mix of smooth yarns works best, since highly textured or fluffy yarns can make it harder to pick up stitches cleanly. Gather as many colors as you like. For a roughly 40 x 40 inch lap blanket, you’ll use somewhere between 1,200 and 1,800 yards total depending on how densely you knit.

Needles: US size 7 (4.5mm) or US size 8 (5.0mm) circular needles, at least 32 inches long. Circular needles are strongly recommended even though you’re working flat (back and forth), because the cable gives you room to accommodate the growing number of stitches as the blanket expands.

Other supplies: A tapestry needle for weaving in ends, scissors, and locking stitch markers to help you track pick-up points.

Gauge

Approximately 18 stitches and 24 rows = 4 inches in garter stitch on US size 8 needles with worsted weight yarn. Gauge is not critical for this project, but it will affect your final dimensions. Swatch if you like a predictable size, or simply knit and enjoy the surprise.

Abbreviations

Throughout this pattern, the following abbreviations are used:

CO — cast on, K — knit, RS — right side, WS — wrong side, PU&K — pick up and knit, st(s) — stitch(es), BO — bind off.

A Note on Garter Stitch

This entire blanket is worked in garter stitch, meaning you knit every row on both the right side and the wrong side. Garter stitch is ideal for log cabin construction for several reasons. It creates a fabric that is the same on both sides, so there’s no awkward “wrong side” to worry about. It lies flat without curling, which means you won’t need to block the life out of it at the end. And it produces a dense, squishy texture that wears beautifully and keeps its shape over many washes.

The Pattern

Section 1: The Center Square

Using your first color, CO 30 stitches.

Row 1 (RS): Knit across.
Row 2 (WS): Knit across.

Repeat these two rows until your piece measures approximately 4 inches from the cast-on edge, ending with a wrong side row. You should have roughly 24 rows total, giving you a section that is roughly 4 inches wide and 4 inches tall. This is your center square.

Do not bind off. Break yarn and leave the stitches live on the needle, or bind off if you prefer and pick up stitches along the bind-off edge in the next step. For the smoothest join, leaving stitches live is recommended where possible.

Section 2: First Log

Choose a second color. With the right side facing, PU&K along the left selvedge edge of your center square. In garter stitch, there are approximately 1 stitch for every 2 rows along a selvedge edge, so you should pick up approximately 12 stitches along the left side of your center square. Now, with the live stitches still on your left needle tip from Section 1, you have approximately 12 picked-up stitches plus 30 live stitches = 42 stitches total on your right needle.

If you bound off after Section 1, PU&K along the cast-on edge of Section 1 (30 stitches) and then along the left selvedge (12 stitches) for the same 42 stitch total. The exact count matters less than consistency — just try to keep your edges smooth and unpuckered.

Row 1 (WS): Knit across all 42 stitches.
Row 2 (RS): Knit across.

Continue in garter stitch for approximately 12 more rows, or until the new strip measures about the same width as your center square (roughly 2 inches). Break yarn.

Section 3: Second Log

Rotate the work 90 degrees clockwise. With a new color (you may continue with Color 2 or switch to Color 3), PU&K along the new bottom edge. You’ll be picking up stitches along the cast-on edge of Section 1 and the bind-off or selvedge edge of Section 2. Aim for approximately 42 stitches.

Work in garter stitch for approximately 12 to 14 rows, or until the strip is roughly 2 inches wide. Break yarn.

Section 4: Third Log

Rotate the work 90 degrees clockwise again. PU&K along the new bottom edge, which now spans the right selvedge of Section 1 and the selvedge of Section 3. Continue picking up stitches proportionally. Work in garter stitch for approximately 12 to 14 rows. Break yarn.

Section 5: Fourth Log

Rotate 90 degrees clockwise. PU&K along the final open edge, closing the first round of logs around your center square. Work in garter stitch for the same number of rows as the other three logs. Break yarn.

You’ve now completed your first full round of logs. Your blanket should measure roughly 8 inches square at this point.

Continuing the Pattern

From here, continue adding rounds of logs in exactly the same way. Each new round of four logs will increase the size of the blanket by approximately 4 inches in every direction. To reach a finished size of roughly 40 x 40 inches, you’ll work approximately 8 rounds of logs after the center square.

A few practical tips as you continue:

Work each log to a width of roughly 2 inches before rotating and beginning the next section. You don’t need to be exact — variation in strip width adds to the handmade charm of the finished piece. If a particular yarn is running low, work a narrower strip to conserve it. If you have a lot of a color you love, let that strip be a little wider.

Change colors as frequently or as infrequently as you like. Some knitters change color with every single log for maximum scrappiness. Others work each full round of four logs in the same color, then switch for the next round, creating concentric bands of color radiating outward from the center. Either approach works beautifully.

When picking up stitches along a garter stitch selvedge, insert your needle under both strands of the selvedge chain stitch for the most secure and tidy pick-up. If you find gaps at corners where two sections meet, you can pick up an extra stitch at the corner and knit two together on the following row to eliminate the gap without adding width.

Final Round and Bind-Off

After your final round of logs, you may add a simple border if you like. To do this, work one additional full round of logs in a single, unifying color, keeping each strip to just 6 to 8 rows (about 1 inch) rather than the full 2 inches. This creates a subtle frame that pulls the whole blanket together visually.

After completing the border, bind off all stitches loosely. A stretchy bind-off such as the Russian bind-off or a simple yarn-over bind-off works well to keep the edge from pulling in.

Finishing

Weave in all ends securely using your tapestry needle. There will be many of them — this is the unglamorous reality of scrap knitting — but they go quickly when you have good lighting and a comfortable chair. Weave each end in at least 1 inch in two directions for security.

Wet block the finished blanket by soaking it in cool water for 20 minutes, gently squeezing out the excess water (never wringing), and laying it flat to dry on a clean towel or blocking mats. Pin out the corners and edges if you want a crisp, square shape. Once dry, the stitches will bloom slightly and the fabric will have a wonderfully even hand.

Customizing Your Log Cabin Scrap Blanket

The basic pattern above gives you the structure, but here are some ideas for making it entirely your own.

For a baby blanket, start with a center square of just 20 stitches and work 5 to 6 rounds of logs. The finished piece will measure approximately 24 to 28 inches square, perfect for a crib or a gift.

For a larger throw, cast on 40 stitches for your center square and work 10 to 12 rounds of logs. With worsted weight yarn, this will produce a blanket in the range of 50 to 55 inches square.

If you want to incorporate DK or fingering weight yarn into the blanket, simply use it for a narrower strip and adjust your expectations slightly — a thinner yarn will produce a more delicate strip that sits comfortably alongside bulkier neighbors. Avoid anything too slippery (like pure silk or bamboo) for your center square, as picking up stitches from it will be tricky. Save those fancy yarns for outer logs where the edge you’re picking up from is already established garter stitch.

You can also work the logs in other simple stitches. A strip of seed stitch creates lovely texture contrast against surrounding garter stitch sections. A strip of ribbing, while it won’t lie as flat, can add visual interest if you don’t mind a little extra blocking effort. And a log worked in a simple eyelet pattern — such as alternating yarn-overs with k2tog across a right-side row — adds a delicate, lacy quality to one section without disrupting the overall structure.

The Joy of a Scrap Project

There’s something deeply satisfying about a project that transforms leftover materials into something whole and purposeful. Every scrap blanket tells a story — that warm gold is from the sweater you made your sister, that deep teal is from your very first pair of handknit socks, that cheerful coral was an impulse purchase at a fiber festival three years ago that never found a project until now. When you wrap yourself or someone you love in a log cabin scrap blanket, you’re wrapped in all of those small histories at once.

This pattern is forgiving enough for confident beginners who understand basic knit stitches and are ready to tackle picking up stitches, and satisfying enough for experienced knitters who want a meditative, low-pressure project they can pick up and put down between more demanding work. There are no complex stitch counts to track, no pattern repeats to maintain, and no anxiety about running out of a specific yarn. The only requirement is showing up with needles and whatever yarn you have on hand.

Cast on, knit your square, rotate, pick up, knit, rotate again. The log cabin scrap blanket asks very little of you and gives back something beautiful, warm, and entirely your own.

Final Thoughts

If you make this blanket, I’d love to hear how it goes. Every single one turns out differently, and that’s the whole point. Your scrap bin is a fingerprint — nobody else has quite the same collection of leftovers, and nobody else will make a blanket that looks exactly like yours. Share it with a friend, donate it to a local shelter, or keep it for yourself on the coldest mornings of the year.

Happy knitting.