In a small bowl, mix the flour, sugars, cinnamon, and salt. Add the melted butter. Stir with a fork until combined. Set aside until you’re ready to use it.
BLUEBERRY COFFEE CAKE
Preheat the oven to 350°F. Spray a 13 × 9-inch baking dish with cooking spray. Line it with parchment paper.
In the bowl of a stand mixer fitted with the paddle attachment, cream the butter and sugars on medium-high speed until light and fluffy, about 5 minutes. Add the eggs, one at a time, mixing well after each addition.
In a measuring cup, whisk together the milk and sour cream.
Into a medium bowl, sift the flour, baking powder, and salt.
With the mixer on low speed, alternate adding small amounts of the flour mixture and the milk mixture to the butter mixture, beginning with the flour mixture and ending with the milk mixture. Use a spatula to fold in 1 cup of the blueberries until evenly dispersed.
Pour the batter into the prepared baking pan. Sprinkle the Brown Sugar Streusel evenly over top, followed by the remaining 1 cup blueberries.
Bake for 45 to 60 minutes, or until a knife inserted in the centre of the cake comes out clean. Let cool to room temperature.
LEMON GLAZE
In a small bowl, whisk together the icing sugar and lemon juice until smooth.
TO SERVE
Drizzle the Lemon Glaze over the Blueberry Coffee Cake. Cut into squares and serve.
Store leftovers in an airtight container at room temperature for up to 3 days.
Notes
Change up the flavour of this cake by swapping the blueberries for an equal amount of raspberries, strawberries, or even cherries!