Kaffe Fassett Hat Box Quilt Series: Quilt Block Background and Y Seams

01_beauty shot

Afraid of Y Seams? They are not as hard as you might expect! I will show you how this is done as we piece the background of the Kaffe Hat Box quilt block.

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Sewing Machine Set-Up

Supplies for Entire Series

Note: Seam allowances are 1/4” unless otherwise noted.

Quilt Block Background – Y Seams

Place the side wall and floor pieces right sides together so you have 4 sets. The floor pieces should be on top. Mark a dot 1/4” inside each corner.

02_floor fabric cut at angle with marked dots

Attach BERNINA Patchwork Foot #97D. Do you use the attachable seam guide? It’s a great option! Thread machine with Mettler Silk Finish Cotton thread. Align the fabric edge with the right edge of the foot. Use your Freehand System to help with exact placement.

03_Foot #97D fabric placement

Sew a 1/4” seam allowance along the raw edge slowing down as you near the marked dot. Your goal is to finish the last stitch on that dot. When the needle is in the dot, do a backstitch. Cut threads. Do same for other 3 sets.

04_needle in marked dot

Carefully press seams open. These are bias edges that stretch so do not move iron over fabric. Gently press.

05_press seam open

The BERNINA Patchwork Feet have notches saving you the time of marking fabric. Pictured below is Patchwork Foot #97D. There are 3 notches on the left toe. The first one (see arrow below) is 1/4” in front of the needle; the middle one is aligned with the needle; the last one is 1/4” behind the needle. You will use the first notch to find your stopping point.

06_Foot #97D notches

Engage Needle Stop Up/Down so the needle stops in the down position. Find your back wall fabric square. Place the back wall fabric on top of side wall fabric right sides together. Align raw edges and sew 1/4” seam allowance. Stop 1/4” from the end which is when you get to the first notch on the left toe.

07_sewing back wall to side wall

With the needle down, raise the foot and check placement. Ideally, the needle should be in the seam line of the mitered corner.

08_raised foot with needle down

This is the tricky part. With the needle down and the foot still raised, move the fabric clockwise so the floor fabric (triangle print) is aligned with the 1/4” mark on the stitch plate.

Then, carefully place back wall fabric (green dots) over floor fabric so raw edges are even. Sew your 1/4” seam allowance to bottom.

10_green dots ready to sew

Carefully press seams to one side as pictured below. What a beautiful Y seam! Now finish the other background blocks.

11_pressed seam on back

Finished block size is 12 1/2” x 12 1/2”.

12_finished background block

Next week get ready for machine applique and decorative stitches! We’re going to have tons of fun with thread color and new Kaffe stitches! If you want to get a head start, play with the Kaffe stitches and discover your favorites!


Kaffe Fassett Hat Box Quilt Series

Join in the quilt along fun by sharing your Kaffe Fassett Hat Box Quilt on social media tagging @berninausa and using #kaffehatboxquilt.

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