These deliciously fudgy, moist Key Lime Brownies are swirled with rich key lime cheesecake filling and topped with cream cheese frosting. What's not to love!

Course Dessert
Cuisine American
Keywords cheesecake brownies, key lime brownies
Prep Time 20 minutes
Cook Time 50 minutes
Total Time 1 hour 10 minutes
Servings 16 brownies
Calories 262 kcal
Author Linda Warren



  • 1 Ghiradelli brownie mix (I used Ghiradelli Chocolate Supreme Brownie Mix)
  • 1/4 cup water
  • 1/2 cup vegetable oil
  • 1 egg

Key Lime Filling

  • 2 egg yolks
  • 10 key limes, juiced (about 1/4 cup) (If you can’t find key limes I recommend Nellie and Joe’s Key West Lime Juice)
  • 3 Tablespoons softened cream cheese
  • 7 oz sweetened condensed milk (1/2 of 14-oz can)

Key Lime Cream Cheese Frosting

  • 3 Tablespoons unsalted butter, room temperature
  • 4 ounces cream cheese, room temperature
  • 2 Tablespoons key lime juice
  • 1/2 teaspoon key lime zest or lemon zest
  • 3 cups confectioner’s sugar


  1. Preheat oven to 325 degrees. Lightly spray a 8x8-inch square baking dish with a nonstick spray.

  2. Mix batter for brownies. Pour 2/3 of it into prepared dish.
  3. In a medium sized bowl, combine egg yolks, key lime juice, cream cheese and sweetened condensed milk. Mix well. (Tint green if making for St. Patrick’s Day otherwise leave the traditional yellow color)
  4. Pour or drop key lime batter over brownie mixture. Pour remaining brownie mixture on top, making sure to cover most of key lime batter. Swirl with a sharp knife.
  5. Bake for 50-60 minutes or until a toothpick inserted in center comes out with just a slight amount of crumbs. Set on wire rack and let cool.
  6. When cool (I suggest putting it in the refrigerator for about 1 hour), either frost entire top or turn out onto wooden cutting board and cut into 16 squares, then frost each one. (Easiest to do if you run a sharp knife under very hot water, cut, wipe off blade, then cut again)

  7. To make frosting, mix all ingredients in a small bowl and beat until smooth. Add a green tint with food coloring for St. Patrick’s Day or leave the more traditional yellow color for summer.
  8. Decorate by either frosting the entire top or, using a decorator's kit with tips, cut into squares and pipe a little on top of each cut brownie.

Nutrition Facts
Amount Per Serving
Calories 262 Calories from Fat 126
% Daily Value*
Fat 14g22%
Saturated Fat 9g45%
Cholesterol 55mg18%
Sodium 54mg2%
Potassium 108mg3%
Carbohydrates 34g11%
Fiber 1g4%
Sugar 29g32%
Protein 2g4%
Vitamin A 300IU6%
Vitamin C 13mg16%
Calcium 64mg6%
Iron 0.4mg2%
* Percent Daily Values are based on a 2000 calorie diet.