Chocolate Chip Sour Cream Coffee Cake

Preheat the oven to 350° F. Line a 9×9 inch square cake pan with parchment paper.
In a bowl, whisk together the flour, baking powder, cinnamon, salt, and espresso/coffee powder. Add the sour cream (or yogurt), eggs, maple syrup, oil, and vanilla. Mix until fully combined. Fold in the chocolate pieces.
To make the streusel: Combine all ingredients in a bowl and mix until a crumble forms.
Pour half the batter into the prepared pan. Sprinkle the streusel over the batter. Evenly spoon the remaining batter overtop. Bake for 45-55 minutes or until the center is just set. Remove and let cool for 30 minutes before icing.
Meanwhile, make the icing (optional). Whisk together the powdered sugar, water or brewed espresso/coffee, and vanilla. Pour the icing over the cake and top with extra chocolate chunks, if desired. Let set for one hour, slice, and enjoy.
Prep Time: 15 minutes | Cooking Time: 55 minutes | Total Time: 1 hour 10 minutes | Kcal: 380 per slice | Servings: 12