1-Preparation and Mise en Place: Start by preheating your oven to 350°F (175°C). Grease an 8-inch round pan and line the bottom with parchment paper. Have all ingredients at room temperature to ensure proper whipping. This step sets up success for your easy genoise cake recipe.

2-First Step: Heat and Whisk the Eggs and Sugar. Combine 4 large eggs and 2/3 cup sugar in a heatproof bowl. Place over a pot of simmering water (sabayon method) and whisk constantly until the mixture reaches 110°F (43°C), about 5-7 minutes. It should triple in volume. This warms the whipped eggs for stability. For vegan adaptations, use aquafaba heated similarly.

3-Second Step: Beat to Ribbon Stage. Remove from heat and beat with an electric mixer on high speed for 5 minutes until pale, thick, and the batter falls in ribbons that dissolve slowly. This creates the foam essential for genoise batter lift. Scrape sides often for even texture.

4-Third Step: Sift and Fold in Flour. Sift 3/4 cup cake flour over the batter in three additions. Fold gently with a spatula using a figure-eight motion to preserve air. Avoid stirring to prevent deflation. Gluten-free flour works here with no changes.

5-Fourth Step: Incorporate Melted Butter. Fold in 2 tbsp warm melted butter (not hot) along the bowl’s edge, then into the center. Move quickly but lightly. This adds tenderness to the sponge cake recipe. Use plant-based butter for dairy-free versions.

6-Fifth Step: Bake the Cake. Pour batter into the prepared pan immediately. Bake for 25-30 minutes until golden and the center springs back when pressed. Use a water bath if your oven heats unevenly for perfect rise. Cool inverted on a rack to avoid sinking.

7-Final Step: Finishing Touches and Serving. Once cool, run a knife around edges and invert onto a plate. Slice for genoise cake for layer cakes or soak with syrup. Serves 8-10. Store as noted below. Total time: 45 minutes active plus baking.