The Knoxville Modern Quilt Guild is ready to make another quilt for a graduate of local nonprofit The Restoration House of East Tennessee, and we've decided to collect these 4-patch butterfly blocks in cool solids from our members. Consistency is one of the challenges of charity block collections, so to help ensure that everyone's blocks fit together well, I've put together a simple tutorial.
4-Patch Butterfly Block
Unfinished size: 12.5" inch using scant 1/4" seam allowance
Finished size: 12"
Step 1: Select 4 solid fabrics in cool colors (blue, green, purple) and cut four 3.5" squares from each color. Cut four 2.5" white squares and then cut each one on the diagonal, resulting in 8 white triangles. (You can also use larger triangles to make piecing a little easier.)
Step 2: Place the white triangles on the corners of two diagonal colored squares as shown. Make sure that when you sew a 1/4" seam from the long edge of the white triangle and then flip it down to cover the corner, the white extends beyond the colored corner. Sew the white triangles in place and press seams open. The triangles do not need to match each other - wonky butterflies are fine!
Step 3: Flip the triangles down and press. Then trim to 3.5" square.
Step 4: Repeat Steps 2 and 3 with each of the other colors.
Step 5: Make sure that all of the butterflies are going in the same direction. Sew the squares of each color into pairs, and press seams open. Then sew the two halves of the blocks together, press open, and sew the four blocks together to finish the block.