Block Library

Churn Dash

A beloved 3×3 traditional block combining half-square triangle corners, two-rectangle bar units, and a plain center square. The name references the paddles of an old butter churn. Churn Dash has appeared in American quilts for over 200 years under many names — Monkey Wrench, Sherman's March, Hole in the Barn Door — but the structure is the same. This is the most common beginner-friendly version using the two-at-a-time HST method.

IntermediateConfident BeginnerTraditionalHalf-Square TrianglesRectangle UnitsGrid Piecing

Why quilters love the Churn Dash

Strong graphic design from simple units
Great second block after Nine Patch and Four Patch
Introduces HSTs and rectangle units together in one project
Rich history — same block, dozens of regional names
Looks striking in both two-color and scrappy versions
Repeats beautifully across an entire quilt top

Construction at a glance

What you'll work with

Half-square triangle (HST) corner units
Two-rectangle bar units on all four sides
Plain center square
3×3 grid layout
No templates required

Churn Dash has many historical variations — some use Flying Geese for the sides, some use different proportions, and some are set on point. This version uses the most common beginner-friendly layout: four HST corners, four two-rectangle bar units, and one center square in a standard 3×3 grid.

Common finished sizes

Adding this block to a project? Track it in QuiltKeeper Studio →

Cutting guide

For a 9" Finished Block

This block uses two fabrics: a background (light) and an accent (dark). The center square can match either fabric or be a third feature fabric.

1 center square at 3.5" × 3.5" (background or feature fabric)
2 squares from background fabric at 3.875" × 3.875" (for HSTs)
2 squares from accent fabric at 3.875" × 3.875" (for HSTs)
4 rectangles from background fabric at 2" × 3.5" (for bar units)
4 rectangles from accent fabric at 2" × 3.5" (for bar units)

The 3.875" squares yield 4 HST units. Cut oversized at 4" and trim HSTs to 3.5" for better accuracy.

Oversized HST Method: Cut your HST squares at 4" instead of 3.875", sew, press, and trim each unit down to exactly 3.5". The small amount of extra fabric gives you room to square up perfectly without worrying about cutting exactly to 3.875".

Sizing formula: Each finished grid unit = 3"
Unfinished unit size = 3.5"
Bar rectangle cut width = finished width (1.5") + 0.5" = 2"

How to sew the Churn Dash

1
Draw a diagonal line on the wrong side of each 3.875" background square.
2
Pair one background square with one accent square, right sides together.
3
Sew 1/4" from each side of the drawn line.
4
Cut on the drawn line to yield two HST units.
5
Press each HST open and trim to 3.5" × 3.5". Repeat to make all 4 HST units.
6
Sew one background rectangle to one accent rectangle along the 3.5" long edge.
7
Press the seam toward the accent fabric. Repeat to make all 4 bar units.
8
Lay out all 9 units in a 3×3 grid: HSTs at corners with dark triangles pointing toward the center, bar units on sides with accent strips pointing inward, center square in the middle.
9
Sew the top row (HST + bar + HST) and press seams toward the bar unit.
10
Sew the middle row (bar + center + bar) and press seams toward the center.
11
Sew the bottom row (HST + bar + HST) and press seams toward the bar unit.
12
Join the three rows, nesting seams at each intersection.
13
Press the block flat and check that it measures 9.5" × 9.5" unfinished.

Accuracy tips

Make HSTs slightly oversized and trim to exactly 3.5" — this is the most important step for a flat, accurate block
Check that bar units also measure 3.5" × 3.5" before assembling
Orient all units on a design wall before sewing to confirm the direction of HSTs and bar units
Nest seams at every row intersection by pressing adjacent rows in opposite directions
Use a scant 1/4" seam if your HSTs are consistently coming out too small after trimming

Common mistakes

HST Corners Point the Wrong Way: One or more HST units were rotated incorrectly. Always lay out all 9 pieces before sewing and double-check that all dark triangles face inward toward the center.
Bar Units Face the Wrong Direction: The accent strip should point toward the center square on all four sides. Check orientation before sewing each row.
Center Intersections Do Not Match: HSTs or bar units were not trimmed to a consistent size, or row seams were not nested. Trim every unit to exactly 3.5" and press row seams in opposite directions.
Block Is Too Small: Seam allowances wider than 1/4" reduce every unit. Use a scant 1/4" seam throughout and check each unit size before assembling.

Fabric ideas

Classic two-color: cream background with navy, red, or green accent
Reproduction prints for a historically accurate antique look
Scrappy accents with a consistent background for variety
Bold modern solids in two high-contrast colors
Subtle tone-on-tone fabrics for an elegant understated look
Seasonal prints paired with a coordinating neutral

Variations

Shoofly (simplified version using plain squares instead of bars)
Monkey Wrench (alternate name, sometimes with different proportions)
Churn Dash on point (rotated 45 degrees in the setting)
Double Churn Dash (four Churn Dash blocks arranged around a center)
Flying Geese variation (uses Flying Geese units instead of bar units)
Scrappy Churn Dash (different accent fabric in every block)

Related blocks

Browse all 9 classic quilt blocks with cutting guides and assembly instructions.

Block Library →