1-First Step: Prepare the dough base. Cream 1 cup softened butter and 1 cup sugar until fluffy, about 2 minutes. Add 1 egg and 1 tsp vanilla, mix well. In a bowl, whisk 2 1/2 cups flour, 1/2 tsp baking powder, and pinch salt. Gradually add dry to wet, forming soft dough. Divide into 4-6 portions for colors. This mise en place sets up smooth patterns. Takes 10 minutes.

2-Second Step: Tint the dough portions. Add gel food coloring to each portion: e.g., red, blue, yellow, green. Knead until uniform. For chocolate variation, mix 1/4 cup cocoa into one batch. Keep portions covered to prevent drying. Vegan tip: Use plant butter here. Gluten-free flour works without changes. 5 minutes.

3-Third Step: Roll into ropes and arrange. On a lightly floured surface, roll each tinted dough into thin ropes, about 8-10 inches long and 1/2-inch thick. Arrange 4-6 ropes side-by-side, alternating colors for stripes. Gently press together, then fold or twist into a log shape. For mosaic, cut ropes into small pieces and press into flat sheet, stack layers. Wrap tightly in plastic. Chill 2-4 hours or overnight for firm slices. Adapt for low-cal by skipping sugar-heavy portions. 15 minutes active.

4-Fourth Step: Slice the chilled logs. Preheat oven to 350°F. Unwrap log, use sharp knife for 1/4-inch thick rounds. Place 1 inch apart on parchment-lined sheets. Re-chill scraps and re-form if needed. Press sprinkles on top now for extra decor. 5 minutes.

5-Fifth Step: Bake to perfection. Bake 8-10 minutes until edges golden. Centers stay pale. Cool on sheet 5 minutes, then rack. Store-bought dough shortcut: Tint, roll, chill 1 hour. Yields consistent royal icing cookies style without mixing.

6-Final Step: Finishing touches and serving. Cool fully. Optional: Pipe royal icing for details in collage cookie decorating. Serve plain or with milk. Perfect for parties. Total time: 30 min active + chill + bake. Beginners succeed every time.