Marble Crumble Coffee Cake

Prep Oven & Pan:

1. Preheat oven to 350°F (175°C) and grease a 9-inch round cake pan.

Make Crumble:

1. Mix topping flour, brown sugar, and cinnamon; rub in cold butter until pea-sized crumbs form.

Chill Crumble:

1. Stir in mini chocolate chips and place the crumble mixture in the fridge.

Cream Butter & Sugar:

1. Beat softened butter and white sugar together for 3 minutes until fluffy.

Add Wet Ingredients:

1. Mix in eggs one at a time, followed by sour cream and vanilla extract.

Combine Dry Base:

1. Whisk flour, baking powder, baking soda, and salt in a separate bowl.

Form Main Batter:

1. Gently fold dry ingredients into the wet mixture just until combined.

Separate Marble Batter:

1. Scoop 1 cup of the batter into a separate small bowl.

Mix Dark Swirl:

1. Stir cocoa powder, dissolved coffee, and cinnamon into that 1 cup of batter.

Layer Batters:

1. Spread the plain vanilla batter into the pan and drop dark spoonfuls on top.

Swirl Layers:

1. Drag a butter knife through the batters in a figure-eight pattern to marbleize.

Top with Crumble:

1. Sprinkle the chilled chocolate chip crumble evenly over the entire top.

Bake Cake:

1. Bake for 35–45 minutes until a toothpick inserted in the center comes out clean.

Cool & Serve:

1. Cool in the pan for 15 minutes, transfer to a rack, slice, and enjoy!