Sunburst Mosaic Granny Square Blanket Free Pattern – Crochet a Radiant Heirloom

Imagine wrapping yourself in a blanket that feels like a warm sunset captured in yarn. The Sunburst Mosaic Granny Square Blanket is exactly that—a stunning two-in-one project that marries the timeless charm of classic granny squares with the modern, geometric beauty of mosaic crochet. Each 12-inch square is a self-contained work of art, featuring a radiant sunburst motif with concentric rings of cream, burnt orange, teal, and mustard yellow. When joined together in a 4x4 grid, these squares create a seamless, reversible design that's not only visually striking but also incredibly cozy.

This pattern is perfect for intermediate crocheters looking to expand their skills, but it's also surprisingly accessible for confident beginners who want to tackle a rewarding project. The repetitive nature of the rounds makes it meditative, and the result is a true heirloom piece you'll treasure for years. Whether draped over a sofa or spread across a bed, this blanket adds a warm, earthy, and geometric touch to any space. Let's dive into creating this radiant masterpiece!

Materials Needed

Before you begin, gather the following supplies. Having everything ready will make your crochet session smooth and enjoyable.

Yarn

• Worsted weight yarn in 4 colors:
  • Color A (Cream): For the center, final round, joining, and border
  • Color B (Burnt Orange): For the first accent ring
  • Color C (Teal): For the second accent ring
  • Color D (Mustard Yellow): For the third accent ring
• Total yardage: Approximately 1800 yards (1645 meters) for the entire blanket. This is an estimate; it's always wise to buy an extra skein of each color to ensure you don't run out.

Hook and Notions

• Crochet hook: 5.5 mm (I-9) hook. This size is ideal for worsted weight yarn to achieve the correct gauge and a nice, drapey fabric.
• Yarn needle: For weaving in ends and sewing the squares together.
• Scissors: For cutting yarn.
• Stitch markers (optional): Helpful for keeping track of rounds, especially when working on the larger squares.

Gauge

4 double crochets (dc) x 2 rows = 1 inch. Each finished square should measure 12 inches across. It's crucial to check your gauge before starting. If your square is smaller, try a larger hook; if it's larger, switch to a smaller hook. This ensures your final blanket is the correct size and your yarn usage is accurate.

Step-by-Step Instructions

This pattern is broken down into three main parts: creating the square motifs, joining them together, and adding the border. Follow each step carefully, and you'll have a beautiful blanket in no time.

Part 1: Square Motif (Make 16)

You will need to make a total of 16 identical squares. Each square is worked in the round, starting from the center and working outward. The stitch count increases each round to keep the square flat and even.

Round 1: With Color A (Cream), make a magic ring. Chain 3 (this counts as your first double crochet). Work 11 double crochets (dc) into the ring. Join with a slip stitch (sl st) to the top of the beginning chain-3. You should have 12 dc stitches. Tip: Pull the magic ring tight to close the center hole completely.

Round 2: Chain 3 (counts as dc). Work 1 dc in the same stitch (this is your increase). Work 2 dc in each stitch around. Join with a sl st to the top of the beginning chain-3. You now have 24 dc stitches.

Round 3: Chain 3 (counts as dc). Work 1 dc in the same stitch. Work 1 dc in the next stitch. *Work 2 dc in the next stitch, work 1 dc in the next stitch.* Repeat from * to * around. Join with a sl st. You now have 36 dc stitches.

Round 4: Switch to Color B (Burnt Orange). Chain 3 (counts as dc). Work 1 dc in the same stitch. Work 1 dc in the next 2 stitches. *Work 2 dc in the next stitch, work 1 dc in the next 2 stitches.* Repeat from * to * around. Join with a sl st. You now have 48 dc stitches.

Round 5: Chain 3 (counts as dc). Work 1 dc in the same stitch. Work 1 dc in the next 3 stitches. *Work 2 dc in the next stitch, work 1 dc in the next 3 stitches.* Repeat from * to * around. Join with a sl st. You now have 60 dc stitches.

Round 6: Switch to Color C (Teal). Chain 3 (counts as dc). Work 1 dc in the same stitch. Work 1 dc in the next 4 stitches. *Work 2 dc in the next stitch, work 1 dc in the next 4 stitches.* Repeat from * to * around. Join with a sl st. You now have 72 dc stitches.

Round 7: Chain 3 (counts as dc). Work 1 dc in the same stitch. Work 1 dc in the next 5 stitches. *Work 2 dc in the next stitch, work 1 dc in the next 5 stitches.* Repeat from * to * around. Join with a sl st. You now have 84 dc stitches.

Round 8: Switch to Color D (Mustard Yellow). Chain 3 (counts as dc). Work 1 dc in the same stitch. Work 1 dc in the next 6 stitches. *Work 2 dc in the next stitch, work 1 dc in the next 6 stitches.* Repeat from * to * around. Join with a sl st. You now have 96 dc stitches.

Round 9: Chain 3 (counts as dc). Work 1 dc in the same stitch. Work 1 dc in the next 7 stitches. *Work 2 dc in the next stitch, work 1 dc in the next 7 stitches.* Repeat from * to * around. Join with a sl st. You now have 108 dc stitches.

Round 10: Switch back to Color A (Cream). Chain 3 (counts as dc). Work 1 dc in the same stitch. Work 1 dc in the next 8 stitches. *Work 2 dc in the next stitch, work 1 dc in the next 8 stitches.* Repeat from * to * around. Join with a sl st. You now have 120 dc stitches.

Round 11: Chain 1 (does not count as a stitch). Work 1 single crochet (sc) in each stitch around. Join with a sl st to the first sc. Fasten off and weave in the end. You should have 120 sc stitches. This final round of single crochet creates a clean, flat edge that will make joining the squares much easier.

Repeat this entire process to create all 16 squares.

Part 2: Mosaic Join (Joining the Squares)

This joining method creates a beautiful, subtle seam that looks like part of the design. It's worked on the wrong side, but the result is reversible and neat on both sides.

Step 1: Arrange Your Squares. Lay out your 16 squares in a 4x4 grid. Play with the placement to ensure the colors are distributed evenly and create a pleasing overall pattern. Once you're happy with the layout, it's time to join.

Step 2: Join the First Row. Take the first two squares from the top row. Place them right sides together (the wrong sides should be facing you). Using Color A (Cream) and your 5.5mm hook, insert the hook through the back loop of the stitch on the square closest to you and the back loop of the corresponding stitch on the square furthest from you. Yarn over and pull through both loops and the loop on your hook to create a slip stitch. Continue working slip stitches or single crochets (sc) across the entire side, inserting your hook through both layers for each stitch. Work one stitch for each of the 120 stitches along the edge. This will securely join the two squares.

Step 3: Continue Joining. Join the next square in the row to the second square in the same manner. Continue until all four squares in the top row are joined into a single strip.

Step 4: Join the Rows. Now, take the first strip and the second strip of squares. Place them right sides together. Using the same technique, join them along the long edge. Repeat this process to join all four rows together, creating one large 4x4 panel.

Step 5: Weave in Ends. Once all squares are joined, weave in all the loose ends from the joining process using your yarn needle. This will keep your blanket looking clean and professional.

Part 3: Border

The border frames your beautiful work and gives it a polished, finished look. It's simple but effective, adding a touch of elegance.

Round 1: With Color A (Cream), attach your yarn to any corner of the blanket. Work a single crochet (sc) evenly around the entire perimeter of the blanket. When you reach a corner, work 3 sc in the corner stitch to help the border turn the corner smoothly and lie flat. Join with a sl st to the first sc.

Round 2: Chain 3 (counts as dc). Work 1 dc in each sc around the blanket. When you reach a corner, work 3 dc in the center corner sc (the middle of the 3-sc corner group from the previous round). Join with a sl st to the top of the beginning chain-3.

Round 3: Chain 1 (does not count as a stitch). Work 1 sc in each dc around the blanket. When you reach a corner, work 3 sc in the center dc of the corner group. Join with a sl st to the first sc. Fasten off.

Final Step: Weave in all remaining ends with your yarn needle. Give your blanket a gentle block if desired—this will help even out the stitches and give it a crisp, professional look.

Congratulations! You've just completed a stunning Sunburst Mosaic Granny Square Blanket. This radiant heirloom piece is sure to be a conversation starter and a cozy favorite for years to come. Enjoy the warmth and beauty of your handmade creation!