Step 1: Preheat the Oven and Prepare the Molds

Preheat your oven to 350°F (175°C). Lightly grease a mini cake pan or cupcake tin with butter or line it with paper liners to prevent sticking. This ensures the cakes come out clean and retain their shape.

Step 2: Cream the Butter and Sugar

In a mixing bowl, beat the butter and sugar together using a hand mixer or stand mixer on medium speed until the mixture becomes light and fluffy. This process usually takes 2-3 minutes and helps create the airy texture sponge cakes are known for.

Step 3: Add the Eggs and Vanilla

Crack in the eggs one at a time, beating well after each addition to ensure they are fully incorporated. Add the vanilla extract and mix again. If you’re using lemon zest, add it at this stage for a subtle citrus aroma.

Step 4: Sift the Dry Ingredients

In a separate bowl, whisk together the flour, baking powder, and salt. Sifting the dry ingredients ensures there are no lumps and keeps the batter light and airy.

Step 5: Combine the Wet and Dry Ingredients

Gradually add the dry ingredients into the wet mixture, alternating with the milk. Start with a portion of the dry mix, then a little milk, and repeat until everything is combined. Mix until just incorporated—avoid overmixing, as this can make the cakes dense.

Step 6: Fill the Cake Molds

Using a spoon or piping bag, evenly distribute the batter into the prepared mini cake molds, filling each about ¾ full. This allows room for the cakes to rise without overflowing.

Step 7: Bake to Perfection

Place the cakes in the preheated oven and bake for 12-15 minutes, or until the tops are lightly golden and a toothpick inserted in the center comes out clean. Keep an eye on them, as mini cakes bake faster than full-sized cakes.

Step 8: Cool and Decorate

Once baked, let the cakes cool in the pan for 5 minutes before transferring them to a wire rack to cool completely. Once cooled, dust them with powdered sugar, top with whipped cream and berries, or spread a thin layer of fruit preserves between two cakes for a delightful sandwich-style treat.