Step 1

Preheat oven to 350º. Lightly grease or spray an 8x8 or 9x9 baking pan.

Step 2

Stir together the flour, brown sugar, and cinnamon. Stir in the butter until mixture is crumbly.

Step 3

In a small bowl, whisk together flour, baking powder and salt and set aside.

Step 4

In a large bowl, beat butter and sugar until light and fluffy. Beat in eggs, vanilla and yogurt until smooth. Add flour mixture and stir until just combined. Gently fold in blueberries.

Step 5

Pour batter into baking pan- sprinkle with topping.

Step 6

Bake at 350º for about 40 minutes, until a toothpick inserted into the center comes out clean.

Step 7

Cool slightly before serving.