Wash and quarter the apples and cut out the core. Cut apple quarters into small cubes. Mix flour and baking powder. Cream sugar, vanilla extract and egg. Alternately stir in cream and flour mixture.
Melt butter and stir in. Halve the mixture. Stir almonds and apples into one half of the dough. Mix the other half with pistachio cream. Coarsely chop the pistachio kernels.
Line recesses of a muffin tray (12 recesses) with paper cups. Fill both doughs alternately into muffin tins. Sprinkle with chopped pistachios and bake in a preheated oven (electric cooker: 190 °C/ convection oven: 165 °C/ gas: see
manufacturer) Bake for 20-25 minutes. Remove and let cool on a cake rack.