Ingredients

• 2 cups of flour
• 1 cup of granulated sugar
• 1 teaspoon of baking powder
• 1/2 teaspoon of sodium bicarbonate (baking soda)
• 1/2 teaspoon of salt
• 1 cup (2 sticks) of butter
• 1 cup of Sour Cream
• 2 egg(s)
• 2 teaspoon of vanilla extract
• 1 cup of brown sugar
• 1 cup of flour
• 1/2 cup (1 stick) of butter, melted
• 1 tablespoon of cinnamon
• 1/2 cup of chopped nuts

Instructions

1. Preheat the Oven Preheat your oven to 350°F (175°C). Grease and flour a 9x13-inch baking pan.

2. Prepare the Streusel Topping In a medium bowl, mix together the brown sugar, flour, melted butter, cinnamon, and chopped nuts until the mixture resembles coarse crumbs. Set aside.

3. Prepare the Cake Batter In a large mixing bowl, cream together the softened butter and granulated sugar until light and fluffy. Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract.

4. Whisk dry ingredients In a separate bowl, whisk together the flour, baking powder, baking soda, and salt.

5. Combine Add the dry ingredients to the wet ingredients in batches, alternating with the sour cream. Begin and end with the dry ingredients, mixing just until combined.

6. Assemble the Cake Pour half of the batter into the prepared baking pan, spreading it evenly. Sprinkle half of the streusel topping over the batter. Repeat with the remaining batter and streusel topping.

7. Bake Bake in the preheated oven for 45-50 minutes or until a toothpick inserted into the center comes out clean. The streusel on top should be golden brown.

8. Cool and Serve Allow the coffee cake to cool in the pan for about 15 minutes before transferring it to a wire rack to cool completely. Once cooled, cut into squares and serve.