1-First Step: Gather all ingredients for this halloween sugar cookies dough. Soften butter at room temperature. Measure flour by spooning into the cup and leveling, not scooping, to avoid dense cookies. Mix dry items: 2 1/2 cups flour, 1 tsp baking soda, 1 tsp cream of tartar, 1/2 tsp salt in a bowl. This setup keeps things smooth for busy home cooks.

2-Second Step: Beat 1 cup softened butter and 1 1/2 cups sugar until fluffy, about 3-4 minutes with a mixer. Scrape sides often. Add 2 eggs one at a time, then 1 tsp vanilla. Mix until combined. For vegan, use flax eggs here. This base ensures soft halloween sugar cookies every time.

3-Third Step: Gradually add dry mix to wet on low speed until dough forms. Do not overmix. Divide into two disks, wrap in plastic, chill 1 hour or overnight. Cold dough prevents spreading, key for cutout cookies. Gluten-free? Chill longer, 2 hours.

4-Fourth Step: Preheat oven to 375°F. Line sheets with parchment. Roll dough 1/4-inch thick on floured surface. Cut with Halloween shapes: ghosts, pumpkins, bats. Place 2 inches apart. Re-roll scraps once for best texture. For low-cal, use smaller cutters.

5-Fifth Step: Bake 8-10 minutes until edges turn light brown. Centers stay pale. Cool on sheet 5 minutes, then wire rack. Yields 3 dozen halloween cookies. Add orange food coloring to dough for fun twist.

6-Sixth Step: Whisk 4 cups powdered sugar, 3 tbsp meringue powder, 6 tbsp water, 1 tsp vanilla 7 minutes to stiff peaks. Divide: black (gel color) for outlines, orange/purple for floods. Thin floods with 1 tsp water per cup.

7-Final Step: On cooled cookies, pipe black outlines. Dry 15 minutes. Flood centers, add sprinkles or candy eyes. Dry 4-6 hours flat. Use squeeze bottles for control. Beginners, practice on wax paper first. Store decorated cookies properly.