Ingredients
Streusel Topping
- ¾ cup all-purpose flour
- ½ cup packed light brown sugar
- ½ teaspoon ground cinnamon
- Dash salt
- ¼ cup unsalted butter, melted
Cake Batter
- ½ cup unsalted butter, room temperature
- ¾ cup sugar
- 1 large egg
- 1 large egg yolk
- ½ cup sour cream
- 1 teaspoon vanilla bean paste
- 1 ⅓ cups all-purpose flour
- 1 teaspoon baking powder
- ¼ teaspoon baking soda
- ¼ teaspoon salt
Instructions
- Prepare the Streusel: Grease an 8-inch square baking pan and line the bottom and sides with parchment paper. In a small bowl, mix the flour, brown sugar, cinnamon, and salt using a fork until evenly combined. Add the melted butter and stir until the mixture is moistened and crumbly.
- Make the Cake Batter: In a large bowl, beat the room temperature butter and sugar together until light and fluffy. Add the egg, egg yolk, sour cream, and vanilla bean paste, mixing until fully combined.
- Combine Dry Ingredients: In a separate bowl, sift together the flour, baking powder, baking soda, and salt. Gradually add these dry ingredients to the wet butter mixture, stirring gently just until combined to avoid overmixing.
- Assemble the Cake: Pour the batter into the prepared pan and spread it evenly. Evenly sprinkle the streusel topping over the batter and create swirls with a skewer or knife to incorporate the streusel into the top layer.
- Air Fry the Cake: Place the pan in the air fryer and bake at 160ºC (320°F) covered with foil for 15 minutes. Remove the foil and continue baking for an additional 5 minutes, or until a toothpick inserted into the center of the cake comes out clean.
- Cool and Serve: Allow the cake to cool completely in the pan before cutting into 16 squares. Serve and enjoy your delicious air-fried coffee cake.
Notes
- Using parchment paper helps prevent the cake from sticking and makes cleanup easier.
- Covering the cake with foil during the initial baking prevents the streusel topping from burning.
- Allow the cake to cool fully to let the texture set, making slicing easier and cleaner.
- Vanilla bean paste can be substituted with pure vanilla extract if needed.
- Be careful not to overmix the batter once combining the dry ingredients to keep the cake tender.
- Prep Time: 10 minutes
- Cook Time: 20 minutes
- Category: Dessert
- Method: Air Frying
- Cuisine: American