Instructions:
Preheat Oven:
Preheat your oven to 350°F (175°C).
Grease and flour an 8×8-inch (20x20cm) baking dish or line it with parchment paper.
Make the Crumb Topping:
In a small bowl, mix together brown sugar, flour, and cinnamon.
Stir in melted butter until the mixture resembles coarse crumbs. Set aside.
Prepare the Cake Batter:
In a large mixing bowl, cream together the softened butter and granulated sugar until light and fluffy.
Beat in the eggs one at a time, then add the vanilla extract.
In another bowl, whisk together flour, baking powder, baking soda, and salt.
Gradually add the dry ingredients to the wet ingredients, alternating with sour cream and milk. Begin and end with the dry ingredients. Mix until just combined.
Assemble the Cake:
Pour the batter into the prepared baking dish, spreading it evenly.
Sprinkle the crumb topping over the batter, ensuring it covers the entire surface.
Bake the Cake:
Bake in the preheated oven for 35-40 minutes, or until a toothpick inserted into the center comes out clean.
Let the cake cool in the pan for about 10 minutes, then transfer to a wire rack to cool completely.
Add the Glaze (Optional):
In a small bowl, whisk together powdered sugar, milk, and vanilla extract until smooth.
Drizzle the glaze over the cooled cake.
Serve:
Slice the cake into squares and enjoy with a hot cup of coffee!
Tips:
For extra flavor, you can add a handful of chopped nuts (walnuts or pecans) to the crumb topping.
If you like a more intense coffee flavor, add 1 teaspoon of instant coffee granules dissolved in 1 tablespoon of hot water to the batter.
Enjoy your homemade coffee cake!
