Step 1: Prepare the Oven and Baking Pan

Preheat your oven to 350°F (175°C).

Grease a 9-inch round cake pan or an 8-inch square baking pan with butter or nonstick cooking spray.

Line the bottom with parchment paper if you want to make removing the cake easier.

Step 2: Make the Chocolate Streusel

In a medium mixing bowl, combine the flour, brown sugar, cinnamon, and cocoa powder.

Add the cold, cubed butter.

Using a pastry cutter, fork, or your fingertips, work the butter into the dry ingredients until the mixture resembles coarse crumbs.

Some larger buttery pieces are perfectly fine. They will create delicious pockets of streusel as the cake bakes.

Place the topping in the refrigerator while you prepare the cake batter.

Step 3: Combine the Dry Ingredients

In a separate bowl, whisk together the flour, baking powder, baking soda, and salt.

Mix until evenly combined, then set aside.

Step 4: Cream the Butter and Sugar

In a large mixing bowl, beat the softened butter and granulated sugar using an electric mixer.

Continue mixing for approximately 2–3 minutes, until the mixture becomes light and fluffy.

This step helps create a soft, tender cake.

Step 5: Add the Eggs and Vanilla

Add the eggs one at a time, beating well after each addition.

Mix in the vanilla extract until incorporated.

Scrape down the sides of the bowl as needed to ensure everything combines evenly.

Step 6: Add the Sour Cream and Coffee

Mix in the sour cream and cooled brewed coffee.

The mixture may look slightly separated at this stage, which is normal.

Continue mixing just until the ingredients are combined.

Step 7: Incorporate the Dry Ingredients

Gradually add the flour mixture to the wet ingredients.

Mix on low speed or fold gently with a spatula until no visible streaks of flour remain.

Avoid overmixing, as this can make the finished cake dense rather than soft and fluffy.

Step 8: Assemble the Cake

Transfer the batter to the prepared baking pan.

Spread it evenly using a spatula.

Remove the chocolate streusel from the refrigerator and sprinkle it evenly over the batter.

Gently press a few larger crumbs into the surface so the topping stays in place.

Step 9: Bake the Cake

Bake for approximately 35–45 minutes, or until a toothpick inserted into the center comes out clean or with a few moist crumbs.

If the topping begins to brown too quickly, loosely cover the pan with aluminum foil during the final minutes of baking.

Allow the cake to cool in the pan for approximately 15 minutes before transferring it to a wire rack.

Step 10: Prepare the Coffee Glaze

In a small bowl, whisk the powdered sugar with the cooled brewed coffee.

Continue mixing until smooth.

If the glaze is too thick, add a little more coffee, one teaspoon at a time.

If it becomes too thin, add a small amount of powdered sugar until it reaches your preferred consistency.

Step 11: Glaze and Serve

Once the cake has cooled completely, drizzle the coffee glaze over the chocolate streusel.

Allow the glaze to set for approximately 10–15 minutes before slicing.

Your Mocha Coffee Cake Recipe is now ready to serve.

Enjoy a slice with coffee, tea, or a cold glass of milk.