Mix the flour, baking powder and almonds in a mixing bowl. Add sugar, spiced biscuits, salt, eggs and butter and knead everything with a mixer (dough hook) to a smooth dough. Chill the dough for about 30 minutes.
Roll out the dough in small portions in the speculoos form with a rolling pin, depending on the model, grease and sprinkle thinly with flour. Cut off the excess dough with a floured knife.
Depending on the model, either bake in the mold (e.g. silicone) or fall out of the model and place on baking sheets lined with baking paper. Place in the oven for about 10 minutes at 180 degrees top / bottom heat.