Preheat the oven to 190 ° C (convection 170 ° C). Separate 2 eggs.
Mix the butter with 100 g sugar, marzipan, lemon zest, 2 eggs and 2 egg yolks. Mix the flour with baking powder, add to the egg mixture with the buttermilk, then fold in the currants.
Line a muffin tin with paper liners, fill in the batter, bake for 20 minutes, remove and let the muffins cool down a little. Set the oven 30 ° C higher. Beat the egg whites with a pinch of salt until stiff. Sprinkle in 100 g of sugar and beat for another 4 minutes. Put the meringue on the muffins, sprinkle with powdered sugar and bake the muffins with the meringue topping for another 4-6 minutes until the meringue topping is lightly browned.