→ Streusel Topping
01 - 1/2 cup granulated sugar
02 - 1/3 cup all-purpose flour
03 - 1/4 cup unsalted butter, cold and cubed
04 - 1/2 teaspoon ground cinnamon
05 - Pinch of salt
→ Cake
06 - 1 1/2 cups all-purpose flour
07 - 1 teaspoon baking powder
08 - 1/2 teaspoon baking soda
09 - 1/4 teaspoon salt
10 - 1/2 cup unsalted butter, softened
11 - 3/4 cup granulated sugar
12 - 2 large eggs, room temperature
13 - 1 tablespoon finely grated lemon zest
14 - 1/4 cup fresh lemon juice
15 - 1 teaspoon vanilla extract
16 - 1/2 cup sour cream or plain Greek yogurt
17 - 1 1/4 cups fresh blueberries