• Follow these steps and you’ll end up with a valentines cake that’s moist and fluffy, easy to assemble, and fun to decorate—no pastry-chef stress required.

Prep your pans and oven

• Preheat the oven to 175°C / 350°F.
• Grease two 8-inch round cake pans, line the bottoms with parchment, then lightly flour the sides.
• If you have a kitchen scale, now’s a great time to use it—consistent layers make any easy layer cake look instantly more polished.
• Quick tip: Set your butter, eggs, and dairy out 30–45 minutes before baking. Room-temp ingredients blend smoothly and help the cake bake evenly.

Mix the cake batter (tender layers, not dense)

• In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt until uniform.
• In a separate mixing bowl, beat the softened butter until creamy (about 1 minute). Add the oil and beat again until glossy.
• Add the eggs one at a time, mixing after each just until combined. Stir in the vanilla.
• Add the dry ingredients in two additions, alternating with the buttermilk (dry → buttermilk → dry). Mix on low and stop as soon as the flour disappears.
• Gently fold in the sour cream or Greek yogurt until the batter looks smooth and thick.
• Don’t overmix: Once flour is in the bowl, mixing too long can make the cake tough. Think “just combined,” not “perfectly whipped.”

Bake

• Divide batter evenly between the pans (an equal fill helps the layers rise at the same rate).
• Bake for 24–30 minutes, or until:
• the tops spring back lightly when touched, and
• a toothpick inserted in the center comes out clean or with a few moist crumbs (not wet batter).
• Cool in the pans for 10 minutes, then turn the cakes out onto a rack to cool completely.
• Important: If the layers are even slightly warm, frosting will melt and slide. Cool fully before assembling.

Make the homemade buttercream

• Beat the softened butter on medium-high for 2–3 minutes until pale and fluffy.
• Add the powdered sugar gradually (1 cup at a time), mixing on low so it doesn’t puff everywhere.
• Add vanilla and a pinch of salt, then beat on medium-high until silky.
• Adjust texture with 3–5 tbsp cream or milk:
• Add a little for a smoother, spreadable frosting
• Use less for firmer piping
• Optional Valentine twist: Beat in freeze-dried strawberry powder or a spoonful of jam. Tint with a tiny amount of gel coloring for pretty pink frosting.

Assemble and decorate

• If needed, level the cake tops with a serrated knife (this helps the layers stack neatly).
• Place the first layer on a plate or cake stand. Spread a thick, even layer of homemade buttercream (and a thin layer of jam if you’d like).
• Add the second layer, cut-side down for a flatter top.
• Apply a thin crumb coat (a light layer of frosting to trap crumbs), then chill for 15–20 minutes.
• Frost the cake with a final, smooth coat. Finish with your favorite heart cake decoration:
• piped rosettes or swirls
• heart sprinkles or chocolate curls
• fresh berries arranged in a heart shape
• Clean-slice trick: Chill the finished cake for 20 minutes, then slice with a sharp knife warmed under hot water and wiped dry between cuts.