Make Master Dough: Cream butter and sugars until smooth. Add eggs and beat until combined. Mix in flour, baking powder, and salt until a smooth dough forms.
Chill: Wrap in cling film and refrigerate for 30–40 minutes (or overnight).
Divide & Flavor: Divide the dough into portions (approx. 200g each). Knead the specific variation ingredients into each portion until fully incorporated.
Shape & Bake: Preheat oven to 180°C (356°F) or 160°C (320°F) convection. Roll out dough on a floured surface (3–5mm thickness). Cut into desired shapes and bake on a lined tray for 8–12 minutes until set.
Assemble & Decorate: Allow cookies to cool completely. For sandwich varieties (Nougat, Spitzbuben, Poppy Seed), fill with jams or creams. Apply glazes, chocolate drizzles, or sugar dustings as required for each delight.
Notes
Consistency: If adding dry powders (like cocoa) makes a dough portion too crumbly, knead in 1 tsp of soft butter.
Uniformity: Use the same thickness for all cookies to ensure they bake evenly across different shapes.
Storage: Store jam-filled cookies separately from dry cookies to maintain crispness. Most varieties last up to 2 weeks in an airtight container.