Quatrefoil Quilt Tutorial: Jenny Doan's Elegant Four-Patch Quilting Design
If you've ever admired those elegant, interlocking designs on cathedral windows and wrought-iron gates, you already love the quatrefoil — and now Jenny Doan is showing us how to bring that gorgeous shape to your next quilt. Using simple four-patches, snowball corners, and 10-inch precut squares, Jenny transforms basic piecing into a stunning, sophisticated design that looks far more complicated than it actually is.
With nearly a million views on YouTube, this is one of Jenny's most beloved tutorials — and once you see how the blocks come together, you'll understand why. The quatrefoil shape emerges like magic when you combine your pieced units, and the result is a quilt that will have everyone asking, "How did you DO that?" Let's dive in!
What Is a Quatrefoil Quilt?
A quatrefoil is a decorative shape made of four overlapping circles or lobes — think of a four-leaf clover, but more elegant. In quilting, we create this effect by combining four-patch blocks with snowball corners on contrasting squares. When the blocks are assembled side by side, the corners create smooth, curved-looking intersections that form that classic quatrefoil pattern across the entire quilt.
The beauty of Jenny's method is that you never have to sew a single curve. Everything is done with straight-line sewing — squares and strips are all you need. The illusion of curves comes from the placement of your snowball corners. It's one of those wonderful quilting tricks that produces maximum visual impact with minimum complexity.
Jenny walks through the block construction step by step — it's easier than you think!
What You'll Need
🎨 Two coordinating fabrics for four-patches — ½ yard each
Jenny uses a purple and a green. These create the "petals" of the quatrefoil. Choose two colors with good contrast to each other. Shop fabric.
⬜ Background fabric — 2 yards
A light neutral (white, cream, or light gray) for the 2½" snowball squares and sashing. This is what makes the quatrefoil pop.
🟫 10-inch precut squares (layer cake) — 1 pack or equivalent
These become the center squares that frame the four-patches. Shop precuts.
🔲 Contrasting center squares — ½ yard
Cut from a 10" square, these go in the middle of the block for the quatrefoil "eye."
✂️ Rotary cutter, ruler & mat — Shop rotary cutters
📌 Pins or clips — Shop pins & clips
🪡 Sewing machine & ¼" presser foot
Step-by-Step Instructions
Step 1: Cut Your Strips and Make Four-Patches
Start by cutting 2½-inch strips from each of your two coordinating fabrics. You'll need enough strips to make the number of four-patches your quilt requires (nine strips of each for a generous throw).
Sew one strip of each color together along the long edge at a quarter-inch seam. Press the seam toward the darker fabric. Repeat for all your strip sets.
Sub-cut: Cut each strip set into 2½" segments
Assemble: Pair two segments with colors opposite (dark-light / light-dark) and sew together to form a four-patch
Step 2: Cut the Setting Squares
Take your 10-inch precut squares and cut each one into four 4½-inch squares. You'll get four squares from each precut, so plan accordingly based on how many blocks you need.
Be precise with your cuts here — Jenny emphasizes counting and double-checking. A 10-inch square gives you exactly four 4½-inch pieces with a little left over.
Precise cutting makes all the difference — take your time with this step!
Step 3: Add Snowball Corners
Cut 2½-inch squares from your background fabric. You'll need 8 small squares per block.
Take each of your 4½-inch setting squares and place a 2½-inch background square on one corner. You can either draw a diagonal line or press the small square in half diagonally to create a sewing guide. Sew along the line from corner to corner.
Add a snowball corner to two adjacent corners on the same side of each setting square. This creates the curved illusion when blocks come together.
Place: Background square on the corner, right sides together
Sew: Diagonal line from corner to outer edge
Trim & Press: Trim the excess, press the triangle open
Step 4: Cut the Center Square
For the center of each block, take a contrasting 10-inch precut square and cut it down to 4½ inches. This becomes the focal point of each quatrefoil block — the "eye" in the center where the four lobes meet.
Choose a fabric that contrasts with both your four-patch colors and your setting squares for maximum visual impact. A bold solid or a directional print can be stunning here.
Step 5: Assemble the Block
Now comes the fun part — arranging and sewing the block! Each block is a 3×3 grid:
Top row: Four-patch | Setting square (snowball corners pointing inward) | Four-patch
Middle row: Setting square (corners inward) | Center square | Setting square (corners inward)
Bottom row: Four-patch | Setting square (corners inward) | Four-patchMake sure all your four-patches are oriented the same way and your snowball corners all point toward the center. Sew each row together, then sew the rows to each other.
When the blocks come together, the quatrefoil pattern emerges beautifully!
Step 6: Arrange and Sew Your Quilt Top
Once you have all your blocks made, lay them out in rows. The beauty of this design is that when the blocks sit next to each other, the snowball corners from adjacent blocks merge to form the complete quatrefoil shapes across the quilt.
Sew your blocks into rows, pressing seams in alternating directions for each row. Then sew the rows together, making sure your seams nest at each intersection for crisp, flat joints.
For a throw-size quilt, a 4×5 arrangement of blocks works beautifully. For a larger bed quilt, go 5×6 or even bigger!
Step 7: Quilt and Bind
Layer your quilt top with batting and backing fabric. Quilt as desired — straight-line quilting along the seam lines emphasizes the geometric design, while free-motion quilting in the open spaces adds beautiful texture.
Finish with your favorite binding method. A binding that matches your background fabric creates a clean, modern frame, while a contrasting binding adds one more pop of color.
Pro Tips for a Perfect Quatrefoil Quilt
🎯 Consistent seam allowance is critical. Because the four-patches, setting squares, and snowball corners all need to align perfectly, a true ¼" seam throughout is essential. Use a ¼" presser foot or guide.
🎨 High contrast = high impact. The quatrefoil shape really pops when there's strong contrast between the four-patch colors and the background. Don't be shy with your color choices!
⬜ Press direction matters. Following Jenny's pressing strategy (middle row seams in, outer row seams out) ensures everything nests together for perfectly flat intersections.
📐 Square up your blocks. Before assembling the quilt top, make sure all blocks measure the same. Trim if needed — even a small difference adds up over many blocks.
✨ Try it with a jelly roll! You can absolutely use precut 2½" strips (a jelly roll) instead of cutting yardage for a scrappier, more colorful version of this quilt.
The quatrefoil quilt is one of those designs that bridges the gap between traditional and modern quilting. It's geometric, it's elegant, and it uses the simplest piecing techniques in the book to create something truly eye-catching. Whether you make it in two bold colors or go scrappy with a layer cake, this pattern will earn you some serious quilting compliments.
Happy quilting! 💛