Blueberry Very Crumby Coffee Cake
Cake 1 Cup Butter 1 1/2 C Sugar 2 Eggs 1 Cup Sour Cream 1 Tbsp Vanilla 2 Cups All Purpose Flour 1 Tbsp Baking Powder 1 tsp Salt Blueberry Filling 2 Cups Fresh or Frozen Blueberries 1/2 Cup Sugar 2 Tbsp Cornstarch 1/2 Cup Water 1 tsp Lemon juice Crumb Topping 1 3/4 Cups Flour 1/2 Cup Sugar 1 …