Yield: 36 Bars

Lemon Cake Bars

Prep Time 15 minutes
Cook Time 20 minutes
Total Time 35 minutes

Thick and easy, these moist Lemon Cake Bars are bursting with citrus flavor. Topped with a luscious lemon buttercream frosting, you'll LOVE this recipe!


For the cake

  • 1 cup unsalted butter, softened
  • 1 cup granulated sugar
  • 1 large egg
  • 1 tsp vanilla extract
  • 1 lemon, juiced and zested
  • ½ cup sour cream
  • 2 ⅔ cup all-purpose flour
  • 1 tsp baking powder
  • ½ tsp baking soda
  • ½ tsp kosher salt

For the frosting

  • ½ cup unsalted butter, softened
  • 2 cups powdered sugar
  • 1 lemon, zested and juiced
  • 1 Tbsp heavy whipping cream


  1. Preheat oven to 350 degrees F. Line a 13x9-inch baking dish with parchment paper or spray with non-stick baking spray (or use my homemade cake release).
  2. In a large mixing bowl, beat softened butter with sugar until creamy. Add in eggs, vanilla, sour cream, and lemon juice, scraping down the sides of the bowl as needed.
  3. Using a wooden spoon (so you do not over mix), add in flour, lemon zest, baking powder, baking soda, and kosher salt.
  4. Spread batter in the prepared baking dish. Bake for 18-20 minutes, remove and cool on wire rack.
  5. For the frosting, beat softened butter with powdered sugar, lemon juice, lemon zest, and heavy cream. Beat until light and fluffy, for about 3-5 minutes, scraping down the sides of the mixing bowl as needed.
  6. Spread frosting over cooled cake bars. Slice and enjoy.


  • Start with softened butter.
  • Do not over mix batter, use a wooden spoon to incorporate dry ingredients.
  • Use fresh squeezed lemon (not bottled lemon concentrate)
  • Cool completely before adding the frosting!

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 157Total Fat: 9gSaturated Fat: 5gTrans Fat: 0gUnsaturated Fat: 3gCholesterol: 28mgSodium: 68mgCarbohydrates: 19gFiber: 0gSugar: 12gProtein: 1g

*Nutrition facts are an estimate and not guaranteed to be accurate. Please see a registered dietitian for special diet advice.

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