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For the Crumb Topping:
- 1/2 cup all-purpose flour
- 1/4 cup granulated sugar
- 1/4 cup brown sugar, packed
- 1/4 cup unsalted butter, cold and cubed
For the Lemon Glaze:
- 1/2 cup powdered sugar
- 1-2 tablespoons fresh lemon juice
Instructions
Step 1: Preheat the Oven
- Preheat your oven to 350°F (175°C). Grease a 9-inch round or square baking pan and set it aside.
Step 2: Make the Cake Batter
- In a large mixing bowl, cream the softened butter and sugar together with an electric mixer on medium speed until light and fluffy, about 2-3 minutes.
- Add the eggs, one at a time, mixing well after each addition. Mix in the sour cream, vanilla extract, and lemon zest until smooth.
- In a separate bowl, whisk together the flour, baking powder, baking soda, and salt. Gradually add the dry ingredients to the wet ingredients, mixing just until combined. Be careful not to overmix.
- Gently fold in the raspberries, being careful not to crush them.
Step 3: Prepare the Crumb Topping
- In a small bowl, mix the flour, granulated sugar, and brown sugar together. Using a pastry cutter or your fingers, cut in the cold butter until the mixture resembles coarse crumbs.
Step 4: Assemble and Bake
- Pour the batter into the prepared baking pan, spreading it evenly. Sprinkle the crumb topping evenly over the batter.
- Bake in the preheated oven for 40-45 minutes, or until a toothpick inserted into the center comes out clean. The top should be golden and slightly firm to the touch.
Step 5: Prepare the Lemon Glaze
- In a small bowl, whisk the powdered sugar with lemon juice until smooth. Adjust the consistency by adding more powdered sugar for a thicker glaze or more lemon juice for a thinner one.
Step 6: Cool and Glaze
- Allow the coffee cake to cool in the pan for about 10 minutes, then transfer it to a wire rack. Drizzle the lemon glaze over the top once the cake has cooled.
Tips and Variations
- Frozen Raspberries: If using frozen raspberries, do not thaw completely as they may bleed into the batter. Simply toss them in a bit of flour before adding to the batter.
- Substitute Berries: Blueberries or blackberries work beautifully in this recipe if raspberries aren’t available.
- Extra Lemon Flavor: Add a teaspoon of lemon extract to the batter for an even more intense lemony flavor.
- Topping Ideas: Sprinkle a handful of sliced almonds or shredded coconut over the crumb topping before baking for added texture and flavor.
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