This ultra-rich, old-fashioned cooked chocolate icing with cocoa powder is ready in just 10 minutes! Boiled on the stovetop until glossy and fudgy, then poured warm over sheet cake for the perfect crackly finish.

A rich slice of chocolate cake topped with glossy cooked chocolate icing made with cocoa powder, showing a thick and fudgy layer.

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Old Fashioned Cooked Chocolate Icing

If you’ve ever tried chocolate Texas sheet cake, then you already know how incredible this cooked chocolate icing with cocoa powder is. It’s a warm, pourable frosting that sets into a glossy, fudgy layer, straight from Grandma’s kitchen and full of old-fashioned charm.

Unlike a chocolate buttercream, this icing is boiled on the stovetop so the sugar and cocoa powder dissolve into a rich, ganache texture. Once the powdered sugar is whisked in, pour it over your dessert for a thick, shiny finish that keeps every bite extra moist.

Why I Love This Recipe

  • Ready in 10 minutes. This cooked chocolate frosting recipe is made from start to finish on the stovetop in less than 10 minutes.
  • Locks in moisture. After pouring the boiled chocolate frosting on top of the cake, it hardens and creates the perfect fudgy layer.

Recipe Ingredients

Overhead view of ingredients for cooked chocolate icing, including cocoa powder, powdered sugar, milk, butter, and vanilla extract.

Find the full printable recipe with specific measurements below.

  • Cocoa powder: Make sure to use unsweetened cocoa powder since the majority of the sweetness will come from the powdered sugar.
  • Powdered sugar: Adds a sweet flavor and thick texture. Make sure to sift the powdered sugar first, so that your icing isn’t lumpy.
  • Butter: Using salted butter will add the best flavor. Cube it first before adding to the pan for easier melting.
  • Milk: Used to help thin out the icing. Whole milk will add the richest flavor.
  • Vanilla: A high quality vanilla extract will give you the perfect boost of vanilla.

How to Make Cooked Chocolate Icing

Boiling chocolate icing on the stovetop with a whisk in a saucepan, as the cocoa powder, butter, and sugar dissolve together.
  1. Melt. Chop the butter into cubes and then add to a medium saucepan. Melt over low heat, then stir in the unsweetened cocoa powder. Let the mixture come to a light boil, then remove the pan from the heat.
  2. Whisk. Slowly whisk in the milk, vanilla extract and sea salt. Once combined, then whisk in the powdered sugar until dissolved and smooth.

Recipe Tips

  • Cube the butter. Chop the butter into pieces before adding to the pan so that it melts more evenly and quickly.
  • Sift the powdered sugar. To avoid a lumpy or grainy texture, make sure to sift the powdered sugar through a fine mesh strainer before whisking into the icing.
  • For a crunchy variation with a rich, nutty taste, fold some chopped pecans or walnuts into the cooked chocolate icing. It adds great flavor and texture!
  • Frost while warm! Pour the icing on right after baking so it soaks into the cake or brownies, just like with my Texas sheet cake cookies. It sets fast!
Warm cooked chocolate icing made with cocoa powder being poured over a freshly baked sheet cake, creating a smooth glossy layer.

Ways to Use Cooked Chocolate Frosting

This cooked chocolate icing with cocoa powder works best as a spreadable topping, making it perfect for sheet cakes, brownies and bars.

A slice of homemade Texas sheet cake topped with cooked chocolate icing made with cocoa powder, ready to serve.

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Warm cooked chocolate icing made with cocoa powder being poured over a freshly baked sheet cake, creating a smooth glossy layer.

Cooked Chocolate Icing

4.98 from 35 votes
Recipe by: Jamielyn Nye
Prep Time: 5 minutes
Cook Time: 5 minutes
Total Time: 10 minutes
Servings: 35
Fudgy, rich and ultra chocolatey, this old fashioned cooked chocolate icing is ready in just 10 minutes! The perfect finishing touch for your baked goods.
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Ingredients 

  • ½ cup (113 grams) salted butter , cubed
  • 3-4 Tablespoons (15 grams) unsweetened cocoa powder
  • ⅓ cup milk
  • 1 teaspoon vanilla extract
  • ⅛ teaspoon table salt or fine sea salt
  • 3 cups (330 grams) sifted powdered sugar

Instructions

  • In a medium saucepan, melt 1/2 cup butter over low heat. Stir in 3-4 Tablespoons cocoa powder. Once the mixture has melted and comes to a light simmer, remove from heat. Slowly whisk in 1/3 cup milk, 1 teaspoon vanilla, and 1/8 teaspoon salt. Then slowly stir in 3 cups powdered sugar.
  • Pour the icing over your sheet-pan cake or brownies the moment they come out of the oven. Spread evenly with a rubber spatula immediately.

Last step: Please leave a comment and rating after you make the recipe.

Notes

Nut lovers: Chop 1/2 to 3/4 cup pecans and mix into the frosting. 
Halve the recipe: This recipe will cover a cake or brownies the size of a half-sheet baking pan (perfect for Texas sheet cake). You can halve this recipe for a 9×13-inch cake or brownies.  

Nutrition

Serving: 1g, Calories: 107kcal, Carbohydrates: 21g, Protein: 0.4g, Fat: 3g, Saturated Fat: 2g, Polyunsaturated Fat: 0.1g, Monounsaturated Fat: 1g, Trans Fat: 0.1g, Cholesterol: 7mg, Sodium: 32mg, Potassium: 24mg, Fiber: 0.5g, Sugar: 20g, Vitamin A: 89IU, Calcium: 5mg, Iron: 0.2mg

Nutrition provided is an estimate. It will vary based on specific ingredients used.