Blueberry Coffee Cake

Step 1

Preheat oven to 350F (175C) and lightly grease and flour a 13x9 baking pan.⁴

Step 2

Combine butter, cream cheese, and sugars and use an electric mixer (or a stand mixer) to cream together ingredients until well-combined, light, and fluffy.

Step 3

Add eggs and vanilla extract and beat on medium-low speed until combined, pausing to scrape the sides and bottom of the bowl.

Step 4

In separate bowl whisk together flour, baking powder, cornstarch and salt.

Step 5

Add about 1/4 of the flour mixture and stir on low speed until just combined. Add about 1/3 of the buttermilk and stir until combined. Continue to alternate adding flour and buttermilk until all are added and mixture is completely combined.

Step 6

Use a spoon or spatula to stir in the blueberries.

Step 7

Spread batter into prepared pan (batter will be thick) and prepare streusel, if using.

Step 8

To make streusel, whisk together flour, sugars, and salt. Drizzle in melted butter and use a fork to stir/toss together until mixture is clumpy but combined (all the butter should be absorbed). Do not use butter that is too hot and do not over-mix or the mixture will be like a paste! It should be clumpy and crumbly.

Step 9

Sprinkle streusel evenly over batter.

Step 10

Bake on 350F for 55-60 minutes or until a toothpick inserted in the center yields moist crumbs or no crumbs.

Step 11

Allow to cool before cutting and serving.