Desserts Images are for illustrative purposes only, may be inaccurate, and do not guarantee the presence or absence of specific ingredients. 
Serving Images are for illustrative purposes only, may be inaccurate, and do not guarantee the presence or absence of specific ingredients. Brownie Heart Cake
A fudgy heart-shaped brownie cake crowned with a creamy white chocolate frosting.
Contains common allergens
In the app, Listahan checks these against your household automatically.
Instructions
7 steps- 1
Preheat the oven to 350°F (175°C). Grease a 5-cup heart-shaped pan and dust it with unsweetened cocoa powder, tapping out the excess.
- 2
In a large bowl, blend together the brown sugar, 3/4 cup softened butter, and vanilla. Add the eggs one at a time, beating well with a wooden spoon after each addition.
- 3
Sift together the flour, cocoa powder, and salt, then add all at once to the creamed mixture, stirring just until blended. Fold in the chopped nuts and spread the batter in the prepared pan.
- 4
Loosely cover the pointed tip of the heart with foil to prevent it from over-drying. Bake for 35 to 40 minutes, or until the center is just barely firm to the touch.
- 5
Let the cake cool in the pan for 10 minutes, then turn it out onto a wire rack and cool completely.
- 6
For the frosting, melt the white chocolate with the remaining 3/4 cup butter in the top of a double boiler over hot (not boiling) water, stirring until smooth. Remove from the heat and let cool slightly, then stir in the sour cream until smooth and blended.
- 7
Refrigerate the frosting for about 10 minutes to firm up, then spread it smoothly over the sides and top of the cooled cake. Dust with cocoa in a decorative pattern and arrange nuts around the top edge to garnish.
Images are for illustrative purposes only, may be inaccurate, and do not guarantee the presence or absence of specific ingredients. Listahan Family Score™
72/100
Good fit for most families
Score reflects how well this recipe fits a typical busy household. In the app, your Family Score is personalized to your household's allergens, kids, and pantry.
Nutrition
per serving640
Calories
7 g
Protein
58 g
Carbs
45 g
Fat
Estimated per serving. Actual values depend on the brands and portions you use.
Listahan cooking guide
Chef notes & practical guide
Technique notes, ingredient swaps, serve-alongside ideas, storage guidance, and equipment for this recipe.
Cultural context
The brownie itself is an American invention, with its earliest printed recipes appearing in early 20th-century Midwestern cookbooks. Baking brownies in a heart-shaped pan became a popular Valentine's Day and celebration tradition in American home kitchens, blending the dense fudgy texture of a classic brownie with the presentation appeal of a layer cake. The sour cream frosting nods to old-fashioned buttercream variations that use tangy dairy to balance sweetness.
Listahan note
This version leans on brown sugar for deep molasses flavor and uses sour cream in the frosting to cut the richness, keeping each slice from feeling too sweet.
Technique cues
- Brown sugar contains molasses, which adds hygroscopic moisture to the crumb; do not substitute white sugar 1:1 or the brownie will bake drier and lose its fudgy pull.
- Melting the butter rather than creaming it discourages gluten development, which is what gives brownies their dense, chewy texture versus a cakier crumb.
- White chocolate pieces melt unevenly into the batter and create pockets of creamy sweetness; chop them small and fold in last so they do not sink entirely to the bottom.
Kitchen flow
- Parallel prep
- While the brownie layer bakes, make the frosting so it is ready to spread as soon as the cake cools completely.
- Make-ahead
- Bake and cool the brownie layer up to 24 hours ahead; wrap tightly in plastic and frost the day of serving.
- Leftover move
- Slice leftovers into individual portions and wrap in plastic wrap; they stay moist at room temperature for 2 days or refrigerated for 5.
- Cleanup rhythm
- Line the heart pan with parchment before baking for a clean lift-out; soak the mixing bowls immediately after frosting to prevent hardened sugar buildup.
Ingredient brief
Role, handling, and swap guidance for each key ingredient.
1 1/2 cups packed brown sugar
primary sweetener and moisture source
Purpose: The molasses in brown sugar draws in atmospheric moisture, producing the signature fudgy interior that sets brownies apart from cake.
Handling: Pack firmly into the measuring cup so no air pockets undercount the amount.
Adaptation: Dark brown sugar deepens the toffee notes; light brown sugar gives a slightly milder result.
3/4 cup unsalted butter (softened)
fat and structure base
Purpose: Butter coats flour proteins and provides richness; unsalted lets you control the total salt level precisely.
Handling: Soften at room temperature for 30 minutes, or microwave in 5-second bursts until just pliable but not melted.
Adaptation: Vegan butter sticks (same volume) work in most brownie bases; expect a slightly different snap when cooled.
1/2 cup unsweetened cocoa powder
chocolate flavor and color
Purpose: Natural cocoa reacts with eggs and brown sugar to build the deep brown color and bitter-chocolate backbone.
Handling: Sift before measuring to remove lumps that would streak the batter.
Adaptation: Dutch-process cocoa gives a smoother, darker result; reduce baking powder by 1/4 tsp if using it in a leavened version.
3 large eggs
binder and fudginess agent
Purpose: Eggs emulsify the fat and sugar, and their proteins set the structure; more eggs shift brownies toward fudgy rather than cakey.
Handling: Use room-temperature eggs so they blend into the batter without seizing the fat.
Adaptation: One flax egg (1 Tbsp ground flaxseed plus 3 Tbsp water, rested 5 minutes) per egg keeps structure in a vegan adaptation.
1/4 cup sour cream
frosting tang and creaminess
Purpose: Sour cream in the frosting adds acidity that balances the sweetness and helps the frosting spread smoothly without cracking.
Handling: Bring to room temperature before beating so it incorporates without lumps.
Adaptation: Full-fat plain Greek yogurt works as a direct substitute in the frosting.
Technique notes
- Pull the brownie from the oven when a toothpick inserted at the center comes out with moist crumbs, not wet batter; carryover heat will finish the set on the counter.
- Let the brownie cool completely before frosting or the butter in the frosting will melt on contact and pool rather than hold its shape.
- Score portion lines with a warm knife (run under hot water and wipe dry) for clean slices through the frosting without dragging.
Ingredient swaps
- Nut-free direction
- Omit walnuts or almonds and replace with an equal volume of chocolate chips or dried tart cherries for texture.
- Dairy-free option
- Use vegan butter throughout and replace sour cream in the frosting with full-fat coconut cream; the flavor profile shifts slightly tropical but holds well.
- Gluten-free direction
- Substitute a 1:1 gluten-free baking flour blend (with xanthan gum included) for the all-purpose flour; baking time may shorten by 3-5 minutes.
Serve alongside
- vanilla bean ice cream alongside each slice
- lightly sweetened whipped cream with a pinch of espresso powder
- fresh raspberry coulis drizzled on the plate
- cold whole milk or oat milk
- dark roast coffee or a double espresso
Serving suggestions only — check pairings for your household's allergens.
Storage & reheating
- Store covered at room temperature for up to 2 days or refrigerate for up to 5 days.
- To restore freshness, microwave a refrigerated slice for 10-12 seconds before serving.
- Freeze unfrosted brownie slices wrapped in plastic then foil for up to 2 months; thaw overnight in the refrigerator.
Equipment
- heart-shaped cake pan (9-inch)
- stand mixer or hand mixer for frosting
- parchment paper for pan lining
- offset spatula for spreading frosting
Make this household-aware
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Plan it in Listahan
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