Preheat oven (electric cooker: 180 °C/circulating air: 160 °C/gas: see manufacturer). Grease ten troughs (each with 60 ml content) of a mini-ball cake mould. Mix flour, sugar and baking powder. Whisk 150 ml buttermilk with egg, oil and lemon peel. Gradually stir in the flour mixture and mix briefly to a smooth dough. Spread the dough into the bowls. Bake in a hot oven for 15-20 minutes. Turn out of the tin onto a cake rack and let it cool down.
Select and wash the berries. Roughly chop the almonds. Sift icing sugar into a bowl and stir with 3-4 tablespoons buttermilk until smooth. Spread the icing on the minigugels. Sprinkle with blueberries and almonds.
Tip: Without the right baking tin, the dough quantity is also sufficient for 4-5 cup cakes. Make sure that the coffee cups are ovenproof. The baking time is extended to approx. 25 minutes.