Ingredients
Equipment
Instructions
- Make the Streusel: In a medium bowl, whisk together the flour, sugars, cinnamon, and salt. Cut in the cold butter with a pastry blender or your fingers until it resembles coarse crumbs. Refrigerate until needed.
- Preheat Oven: Preheat oven to 350°F (175°C). Grease and flour a 9x9 inch baking pan.
- Combine Dry Ingredients: In a separate bowl, whisk together the 2 cups of flour, baking powder, baking soda, and salt.
- Cream Butter & Sugar: In a large bowl, beat the softened butter and 1 cup of granulated sugar until light and fluffy, about 3-4 minutes.
- Add Wet Ingredients: Beat in the eggs one at a time, then stir in the vanilla and sour cream.
- Combine Batter: Add the dry ingredients to the wet ingredients and mix on low speed until just combined. Do not overmix.
- Add Blueberries: Gently toss the blueberries with 1 tablespoon of flour, then fold them into the batter.
- Assemble and Bake: Spread the batter into the prepared pan. Sprinkle the chilled streusel topping evenly over the top. Bake for 45-55 minutes, until a tester inserted into the center comes out with moist crumbs.
- Cool: Let the cake cool in the pan on a wire rack for at least 20 minutes before slicing and serving.
Notes
Room Temperature Ingredients: For the moistest cake, ensure your butter, eggs, and sour cream are at room temperature.
Storing: Store the coffee cake in an airtight container at room temperature for up to 3 days.
Frozen Blueberries: If using frozen blueberries, do not thaw them before adding them to the batter to prevent the batter from turning purple.
Storing: Store the coffee cake in an airtight container at room temperature for up to 3 days.
Frozen Blueberries: If using frozen blueberries, do not thaw them before adding them to the batter to prevent the batter from turning purple.
