Ingredients
Method
- Warm 1 cup milk and 1 cup finely crushed cereal until steaming. Cover and steep 30 minutes, then strain through a fine-mesh sieve, pressing to extract all liquid. Cool completely.
- Preheat oven to 350°F (175°C) and grease a 9x13-inch metal pan. Whisk flour, both sugars, baking powder, baking soda, salt, and 1 teaspoon cinnamon in a large bowl. In another bowl, whisk melted 1/2 cup butter, eggs, sour cream, 1/2 cup milk, and 2 teaspoons vanilla. Fold wet into dry until just combined.
- Stir together 1/4 cup sugar with 2 teaspoons cinnamon. Spread half the batter in the pan, sprinkle the sugar mixture evenly, top with remaining batter, and swirl with a knife.
- Bake for 30–35 minutes until a toothpick comes out with moist crumbs. Cool in pan 15 minutes, then turn out onto a rack to cool completely.
- Beat cream cheese and 1/2 cup softened butter until fluffy. Add 1 cup powdered sugar, the cooled cereal milk, 1 teaspoon vanilla, and a pinch of salt; beat well. Gradually beat in the remaining 2 cups powdered sugar until smooth and spreadable.
- Frost the cooled cake and immediately top with 1/2 cup roughly crushed cereal. Serve right away for the crunchiest topping.
Notes
The cereal milk needs 30 minutes to steep; start it first and let it sit while you prepare the batter and bake the cake. The cereal topping loses its crunch after a day, so this cake is best assembled and served the same day.
