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Cinnamon Sheet Cake with Frosting

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A soft, moist Cinnamon Sheet Cake infused with warm cinnamon spice and topped with a creamy vanilla or cinnamon frosting—perfect for gatherings, potlucks, and simple dessert cravings.

Ingredients

Scale
  • 2 cups all-purpose flour
  • 1 1/2 cups granulated sugar
  • 1 tsp baking soda
  • 1/2 tsp salt
  • 2 tsp ground cinnamon
  • 1 cup unsalted butter
  • 1 cup water
  • 1/2 cup sour cream
  • 2 large eggs
  • 1 tsp vanilla extract
  • Frosting:
  • 1/2 cup unsalted butter
  • 4 cups powdered sugar
  • 1/4 cup milk (more if needed)
  • 1 tsp vanilla extract
  • 1/2 tsp cinnamon (optional for cinnamon frosting)

Instructions

  1. Preheat the oven to 350°F (175°C). Grease a 9×13-inch baking pan.
  2. In a large bowl, whisk together the flour, sugar, baking soda, salt, and cinnamon.
  3. In a saucepan, melt the butter with the water and bring just to a simmer.
  4. Pour the hot butter mixture over the dry ingredients and mix until combined.
  5. Whisk in sour cream, eggs, and vanilla until the batter is smooth.
  6. Pour the batter into the prepared pan and bake for 22–28 minutes, or until a toothpick inserted comes out clean.
  7. For the frosting, melt the butter in a saucepan. Remove from heat and whisk in powdered sugar, milk, vanilla, and cinnamon (if using) until smooth.
  8. Pour the warm frosting over the warm cake and spread evenly.
  9. Allow the cake to cool and the frosting to set before slicing.

Notes

  • For extra cinnamon flavor, increase cinnamon by 1/2–1 teaspoon.
  • Frost while both cake and frosting are warm for a smooth, glossy finish.
  • Add chopped pecans or walnuts to the top for texture.
  • Great for serving a crowd—keeps well and stays moist.

Nutrition

Find it online: https://tastyera.com/cinnamon-sheet-cake-with-frosting/