Prep the berries: In a bowl, toss berries with 1 tablespoon sugar and 1 tablespoon lemon juice. Let them sit for 15–20 minutes to release their juices. This quick maceration intensifies flavor and keeps the berries glossy.

Heat the oven: Preheat to 350°F (175°C). Grease a standard muffin tin or eight 4-inch tartlet molds. You can also use a square pan and cut portions later, but individual cakes look neat and bake evenly.

Mix dry ingredients: In a bowl, whisk flour, baking powder, salt, and lemon zest. The zest perfumes the batter without making it taste like lemon cake.

Cream butter and sugar: In another bowl, beat the softened butter with 3/4 cup granulated sugar until light and fluffy, about 2–3 minutes. Add the eggs one at a time, beating well after each. Stir in 1 teaspoon vanilla.

Combine the batter: Add the dry ingredients in two additions, alternating with the milk. Mix on low just until everything is smooth. Avoid overmixing; you want a tender crumb.

Fill and bake: Divide the batter evenly among the prepared cups or molds, filling each about two-thirds full. Bake 16–20 minutes, until the tops are golden and a toothpick comes out with a few moist crumbs. Cool in the pan for 5 minutes, then transfer to a rack to cool completely.

Make the vanilla cream: In a chilled bowl, beat heavy cream to soft peaks. In a separate bowl, beat mascarpone (or cream cheese) with powdered sugar and the remaining 1 teaspoon vanilla until smooth. Gently fold the whipped cream into the mascarpone mixture until just combined. Keep chilled until use.

Assemble: Spoon a generous dollop of vanilla cream over each cake. Top with a scoop of the macerated berries, letting a little of the syrup drip down the sides. Add mint leaves and a light dusting of powdered sugar if you like.

Serve: These are best enjoyed soon after assembly while the cakes are soft and the cream is cool.