Ingredients
Method
Preparation
- Preheat your oven to 350 degrees F (175 degrees C).
- Spray a 9x13-inch baking dish with non-stick cooking spray or grease and flour it.
Mixing
- In a large mixing bowl, combine the cake mix, sour cream, eggs, vegetable oil, and water. Beat with a mixer on medium speed for about 2 minutes until well-blended.
- In a separate bowl, mix the brown sugar and cinnamon until combined.
Layering
- Pour half of the batter into the greased baking dish. Sprinkle half of the brown sugar mixture over it. Pour the remaining batter on top and sprinkle with the rest of the brown sugar mixture.
- Using a butter knife, gently swirl the batter to create a marbled effect.
Baking
- Bake for 38-40 minutes, until a toothpick inserted in the center comes out clean.
Glazing
- While the cake cools, whisk together the confectioners' sugar, milk, and vanilla until smooth.
- Once cooled, pour the glaze over the cake evenly. Let the cake cool completely before slicing.
Notes
Keep an eye on the cake for the last 5 minutes of baking. Allow to cool in the pan for about 10-15 minutes before glazing. Store in an airtight container for up to 3 days at room temperature or refrigerate for a week. For make-ahead, layers can be prepared and refrigerated overnight.
