Heavenly Heart Cake
Submitted by minglis
Heart-shaped chocolate Valentine cake with glossy sour cream chocolate frosting and a piped buttercream border. Romantic dessert with deep cocoa flavor.
YIELD
10 servingsPREP
30 minCOOK
30 minREADY
90 minThis chocolate cake is built for Valentine’s Day (or any day a heart-shaped cake belongs at the table). Cocoa bloomed in boiling water creates the deepest possible chocolate flavor, baked into two heart-shaped layers and finished with two contrasting frostings: a glossy sour cream chocolate ganache on top and a piped buttercream border for definition.
Blooming the cocoa in boiling water is the technique most home bakers skip and shouldn’t. Hot water dissolves the cocoa proteins and releases the volatile aroma compounds locked in the dry powder. The difference between bloomed and unbloomed cocoa is the difference between deep restaurant chocolate flavor and flat brownie-mix taste.
Cake flour gives this cake its signature tender, soft crumb. The lower protein content (compared to all-purpose) develops less gluten during mixing, producing a fine, almost downy texture. Use the all-purpose substitution (1 ¾ cups) only if you must.
The sour cream in the frosting is the unexpected hero. It cuts through the sweetness with a faint tang and contributes the unmistakable glossy sheen that makes this frosting look professionally piped even when applied with a spatula.
Pro Tips
- Use room-temperature buttermilk and eggs. Cold ingredients seize the butter and create lumpy batter.
- Bake just until a toothpick comes out with a few moist crumbs, not bone dry. Overbaked chocolate cake reads chalky in the mouth.
- Apply a thin crumb coat of buttercream first, chill for 15 minutes, then add the final layer. This gives you that bakery-clean finish.
- For the cleanest buttercream border, refrigerate the cake for 30 minutes before piping. The frosting holds its shape better against a cold base.
Variations
- Add a teaspoon of espresso powder to the dry ingredients. It deepens the chocolate flavor without making the cake taste like coffee.
- Fill between layers with raspberry jam, strawberry preserves, or fresh whipped cream for a Valentine’s twist.
- Tint the buttercream pink or red with gel food coloring for full holiday commitment.
Ingredients
Directions
Heat oven to 350℉ (180℃). Grease and flour 2 heart-shaped pans or 2 9-inch round baking pans.
In small bowl, stir together cocoa and boiling water until mixed.
In large bowl, beat butter, sugar and vanilla until fluffy; beat in eggs and cocoa mixture.
Stir together flour, baking soda and salt; add alternately with milk.
Pour batter into prepared pans.
Bake 30 to 35 minutes or until wooden pick inserted in center comes out clean.
Cool 10 minutes; remove from pans to wire racks.
Cool completely.
Prepare GLOSSY CHOCOLATE SOUR CREAM FROSTING;
Pipe border around top edge and base of cake with CREAMY BUTTERCREAM FROSTING.
Garnish as desired. 10 to 12 servings.
- To sour milk: Use 2 teaspoons white vinegar plus milk to equal ¾ cup.
GLOSSY CHOCOLATE SOUR CREAM FROSTING: In medium microwave-safe bowl, place small chocolate chips. Microwave at HIGH (100%) 1 minute; stir.
If necessary, microwave at HIGH an additional 15 seconds at a time, stirring after each heating, just until chips are melted when stirred.
Add powdered sugar, sour cream and vanilla; beat until smooth.
Add milk, ½ teaspoon at a time, for a thinner consistency.
About 2½ cups frosting.
CREAMY BUTTERCREAM FROSTING: In small bowl, combine 2 cups powdered sugar, ¼ cup (½ stick) softened butter or margarine, 2 to 3 tablespoons milk and ½ teaspoon vanilla extract; beat until smooth and creamy.
About 1 cup frosting.
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