Blueberry Muffins with Crumb Topping (Print Version)

# Ingredients:

→ Streusel Crumb Topping

01 - 1/2 cup all-purpose flour (72g)
02 - 1/2 cup sugar (112g)
03 - 1/2 teaspoon ground cinnamon
04 - 1/4 cup butter, melted (salted or unsalted)

→ Muffin Batter

05 - 1.5 cups all-purpose flour (212g)
06 - 3/4 cup granulated sugar
07 - 2 teaspoons baking powder
08 - 1/4 teaspoon kosher salt
09 - Zest of 2 meyer lemons (or 1 orange plus 1 lemon)
10 - 1/3 cup unsalted butter, melted (5.33 tablespoons)
11 - 1 large egg
12 - 2/3 cup buttermilk
13 - 2 cups blueberries (fresh or frozen)

# Instructions:

01 - Preheat oven to 375°F. Line a muffin tin with paper liners.
02 - In a small bowl, whisk together flour, sugar, and cinnamon. Pour in melted butter and mix with a fork until crumbs form. Chill in refrigerator.
03 - In a large bowl, whisk together flour, sugar, baking powder, salt and citrus zest.
04 - In another large bowl, whisk together melted butter, egg, and buttermilk. Don't worry if it looks curdled.
05 - Add wet ingredients to dry ingredients. Stir just until batter comes together - it should be thick and lumpy. Do not overmix.
06 - Fold in blueberries gently until evenly distributed. Avoid overmixing to prevent purple batter.
07 - Using a 3-tablespoon cookie scoop, divide batter between 12 muffin cups.
08 - Break up chilled crumb topping with fingers and sprinkle over muffin batter.
09 - Bake for 28-30 minutes until crumbs are golden brown and muffin springs back when lightly pressed.
10 - Can be enjoyed warm, but flavor is best after cooling for about 2 hours.

# Notes:

01 - Both fresh or frozen blueberries work well
02 - Citrus zest can be customized using meyer lemons, regular lemons, or oranges
03 - The batter should be thick and lumpy - do not overmix