Preheat your oven to 350°F and prepare two 8-inch round pans with parchment circles. I grease the sides but use parchment on the bottom because the elegant summer mango cake needs support while baking, and butter alone won't hold it. This prevents sticking and ensures clean cake releases.

Cream the softened butter with granulated sugar for exactly three minutes on medium speed until the mixture turns pale and fluffy. You'll see the color lighten noticeably—this is when you know you've trapped enough air bubbles. Stop creaming too early and your cake stays dense; go too long and you'll overwork the gluten.

Add eggs one at a time, beating 20 seconds between each addition, then mix in the vanilla bean seeds and lemon zest. I learned this the hard way when I dumped all eggs in at once and the batter broke—adding them slowly keeps emulsion stable. The lemon zest should be finely grated so it distributes evenly instead of creating bitter pockets.

Whisk together flour, baking powder, and salt in a separate bowl before alternating dry ingredients with the coconut milk mixture, starting and ending with dry. This prevents overmixing because you're handling the batter less overall, which keeps the elegant summer mango cake tender. Never stir more than 12 strokes between additions.

Fold the mango puree in with a spatula using just eight to ten folds—this is the crucial moment most recipes miss. I count out loud because it's easy to fold too much and deflate all that air you trapped earlier. The mango should streak through the batter rather than disappear completely into it.

Divide batter evenly between prepared pans and smooth the tops gently. Bake for 40 to 45 minutes until a toothpick inserted in the center comes out with just a few moist crumbs. The elegant summer mango cake is done when the edges pull slightly from the pan sides and the top springs back when lightly touched.

Cool in pans for 15 minutes, then turn out onto wire racks to cool completely before assembling. I use parchment to help release, then peel it away—rushing this step cracks the delicate cake structure. Full cooling takes about two hours, but you can speed this by placing pans in the refrigerator for 30 minutes.