This moist and tender zucchini coffee cake is a delightful way to use up summer’s bounty. Infused with warm spices and topped with a buttery streusel, it’s perfect for breakfast, brunch, or an afternoon treat with coffee. The zucchini adds moisture without overpowering the flavor, while the crumbly topping provides a satisfying crunch.
Preheat and Prep: Preheat your oven to 350°F (175°C). Spray an 8 or 9-inch round or square baking pan with nonstick cooking spray.
Prepare the Cake Batter: In a large bowl, whisk together the flour, baking powder, baking soda, salt, cinnamon, and nutmeg. Set aside.
Cream the Butter and Sugars: In a separate large bowl, using a hand mixer or stand mixer fitted with the paddle attachment, beat the softened butter, granulated sugar, and brown sugar on medium speed until light and fluffy, about 2-3 minutes.
Add Wet Ingredients: Add eggs, vanilla extract, and sour cream and mix until just combined.
Combine Wet and Dry Ingredients: Add the dry ingredients to the wet mixture, mixing on low speed until just incorporated. Do not overmix. Fold in the grated zucchini with a spatula until evenly distributed.
Make the Streusel Topping: In a medium bowl, combine the flour, brown sugar, cinnamon, and salt. Stir in the melted butter until the mixture forms coarse crumbs. If using nuts, fold them in. Set aside.
Assemble the Cake: Spread the batter evenly into the prepared pan. Sprinkle the streusel topping evenly over the batter, covering the entire surface.
Bake: Bake for 45-55 minutes (depending on pan size), or until a toothpick inserted into the center comes out clean or with a few moist crumbs.
Cool and Serve: Allow the cake to cool in the pan on a wire rack for 15 minutes before slicing. Best served warm.
Notes
Yellow Squash Swap: For yellow squash substitution, always squeeze out excess moisture due to higher water content.
To Serve: Enjoy warm with a small pat of butter for an indulgent touch.
Make it a Dessert: Make a simple glaze with 1 cup of powdered sugar (115g) and 1 to 2 tablespoons of milk. Drizzle over slightly cooled cake.