Ingredients
Method
- Heat oven to 350°F. Grease a 9x13 pan. Whisk cake mix, eggs, 1 cup milk, oil, 2 teaspoons vanilla, and 1 teaspoon cinnamon. Pour into pan.
- Mix brown sugar and remaining 1 teaspoon cinnamon. Sprinkle over batter. Swirl with a knife. Bake 25-30 minutes.
- Cool cake 5 minutes, then poke holes all over with a wooden spoon handle. Whisk sweetened condensed milk and melted butter; pour over cake. Cool completely.
- Whisk powdered sugar, 2 tablespoons milk, and 1/2 teaspoon vanilla until smooth, adding more milk if needed. Drizzle over cooled cake, slice, and serve.
Notes
Let the cake cool at least 1 hour before glazing, or refrigerate for a firmer texture. The cake is even better the next day.
