You will fall in love with this Zucchini Crumb Cake. With its thick, crumble topping and a moist, tender texture is the ultimate comfort treat that's so good you'll forget it's packed with veggies!
Preheat oven to 350 degrees Fahrenheit (175 degrees Celsius). Spray a 9x9-inch baking pan with non-stick spray or line with parchment paper; set aside.
In a small mixing bowl, whisk together flour, baking powder, baking soda, salt, cinnamon, and pumpkin pie spice; set aside.
In a large mixing bowl (with a hand mixer) or the bowl of a stand mixer, beat sour cream, sugar, melted butter, eggs, and vanilla until combined. Add the shredded zucchini and gently mix in. Slowly add dry ingredients and mix until combined.
Spread batter into prepared pan. Combine all topping ingredients in a small mixing bowl. When large crumbs form, sprinkle over the cake batter. Bake for 35-45 minutes or until the center is set. Remove from oven and cool in the pan for 20 minutes before cutting or removing.
Notes
-You can omit the walnuts completely or swap them out for pecans!STORE leftover cake at room temperature or in the fridge for up to 2-5 days. To FREEZE, place it unwrapped in the freezer for an hour until solid, then wrap it tightly in plastic wrap and aluminum foil. It will stay good for up to 4 months.When ready to eat, thaw it on the counter at room temperature.