Classic Blueberry Crumbcake

---

---

Steps

---

Crumb topping: in a medium bowl , combine cinnamon , salt , sugar , and flour.

---

Cut in the butter using your hands , 2 knives , or a pastry blender until well combined and crumbly.

---

Preheat oven to 350 degrees f.

---

Sift together flour , baking soda , baking powder , and salt into a bowl , set aside.

---

Butter a 9-inch square baking pan , set aside.

---

In the bowl of electric mixer fitter with the paddle attachment , cream butter and granulated sugar until light and fluffy , about 4 minutes.

---

Add eggs , 1 at a time until well combined.

---

Add vanilla , and beat until combined.

---

Add reserved flour mixture and the sour cream , and beat just until well combined.

---

Fold in 2 cups blueberries.

---

Spoon batter into prepared pan.

---

Toss remaining cup blueberries with the crumb topping.

---

Sprinkle the crumb topping over cake.

---

Bake until golden brown and cake tester comes out clean , 50 to 60 minutes', dust with confectioners' sugar before serving"]".

---

Ingredients

---

all-purpose flour, baking soda, baking powder, coarse salt, unsalted butter, granulated sugar, eggs, pure vanilla extract, sour cream, blueberries, ground cinnamon, light brown sugar', confectioners' sugar"]"