- 2 cups flour (regular flour or whole wheat flour)
- 1 tsp baking soda
- 1/4 tsp salt
- 3 Tb. sugar
- 1/2 tsp cinnamon
- 1/2 cup chopped walnuts
- 1/2 cup packed brown sugar
- 4 Tb butter, at room temperature
- 2 eggs
- 1 tsp vanilla extract
- 1 cup plain yogurt
- 1 cup fresh blueberries (or frozen and thawed)
Preheat oven to 350 degrees. Butter an 8-inch square cake pan. Mix together flour, baking soda and salt. In a separate bowl, stir together the granulated sugar, cinnamon and walnuts.
In a large bowl, beat the brown sugar and butter until fluffy. Beat in the eggs, 1 at a time, until fully combined, then beat in the vanilla and yogurt.Add the flour mixture in 2 batches, stirring until just combined.
Add the blueberries to the batter and gently combine. Spoon the batter into the pan, and then sprinkle the nut mixture over the cake. Bake until a knife inserted in the center comes out clean — about 35 to 40 minutes. Let cool and cut into squares.