Ingredients
Equipment
Method
Preparation Steps:
- Gather all your ingredients. Preheat your oven to 350°F (175°C) and grease your baking pan to prevent sticking.
- In a bowl, combine 1 cup + 2 tablespoons of all-purpose flour, 1/3 cup packed light brown sugar, 1/3 cup granulated sugar, 1 teaspoon ground cinnamon, and 1/4 teaspoon salt. Pour in the melted butter and mix until the mixture resembles coarse crumbs. Set aside.
- In another bowl, whisk together 1 cup of all-purpose flour, 3/4 teaspoon baking powder, 1/8 teaspoon baking soda, and 1/4 teaspoon salt. In a separate mixing bowl, cream together 5 tablespoons of softened unsalted butter and 1/2 cup granulated sugar until light and fluffy. Beat in the large egg and 1 teaspoon of vanilla extract. Gradually mix in the dry ingredients, alternating with 1/4 cup milk and 1/4 cup sour cream, until just combined.
- Pour the cake batter into your prepared baking pan, spreading it evenly. Sprinkle the crumb topping generously over the batter, ensuring it covers the surface well.
- Bake in the preheated oven for 30-35 minutes, or until a toothpick inserted into the center comes out clean. The top should be golden brown and the crumb topping should look deliciously crunchy.
- Once baked, remove the cake from the oven and allow it to cool in the pan for about 10 minutes before transferring it to a cooling rack. Let it cool completely before slicing into squares.
Notes
- Store cake in an airtight container at room temperature for up to 3 days.
- Wrap tightly in plastic wrap and refrigerate for up to a week for longer storage.
- Freeze the crumb cake for up to 3 months; thaw overnight in the refrigerator before serving.
