Step 1

Mix sugar with softened butter. Add nutmeg and vanilla sugar. Whisk until smooth. Sift together the flour and baking powder. Combine with butter mixture, add eggs, rolled oats, lemon zest, mix with mixer. Add the peeled and chopped nuts, mix. Wrap the dough in cling film and put it in the refrigerator for 30 minutes.

Step 2

Roll out the dough between two sheets of parchment to a thickness of 0.5 cm. Cut circles out of the dough. Place on a baking tray lined with parchment. Bake for 15 minutes at 160℃. Then allow to cool completely.

Step 3

Prepare the glaze. Whisk the egg whites. Add powdered sugar, whisk until the consistency of thick sour cream. Divide the glaze into 3 parts, add colorant to each, mix, transfer to pastry bags. Color the cookies.

Step 4

Place the cookies in an oven preheated to 130 degrees for 10 minutes and wait patiently. Then allow to cool completely. Enjoy.