Halloween tricks? Check. Treats? Uh, still working on that one. Here’s a solution: Pumpkin Witches from Chelsea’s Fat Witch Bakery. Makes 36 squares Ingredients: 1 2/3 cup unbleached flour ¼ tsp. baking powder 1 tsp. baking soda ½ tbs. cinnamon ¼ tsp. nutmeg 1/3 cup butter (at room temperature) 1 1/3 cup granulated sugar 2 large eggs 1 tbs. vanilla ½ cup water 1 cup no-spice canned pumpkin ½ cup chocolate chips 1. Preheat oven to 350º. 2. Sift together flour, baking powder, baking soda, cinnamon, and nutmeg. Then set aside. 3. Mix butter, sugar, and vanilla. 4. Beat in eggs. 5. Stir in pumpkin. 6. Fold in dry ingredients. (Batter consistency should be between cake mix and cookie dough. If it’s too thick, add a little water.) 7. Add chocolate chips. 8. Pour into ten-by-fifteen-inch jelly roll pan and bake 25-35 minutes. 9 . Let cool 45 minutes and cut into two-inch pieces. See? There’s nothing scary about that. Also available at Fat Witch Bakery, 75 Ninth Avenue, at 15th Street, inside the Chelsea Market (212-807-1335 or fatwitch.com). SCREAM Halloween at the A-scarium What: Check out monsters of the sea, a spooky 3-D ride, and the Haunted Pavilion. Why: Boredom doesn’t stand a ghost of a chance. When: Sat. & Sun., Oct. 27-28 & 31, noon-4 p.m. Where: New York Aquarium, 602 Surf Ave., at W. 8th St., Brooklyn (718-265-3474). BELIEVE The Great Pumpkin Party What: Trick-or-treating; pumpkin carving; and party pics with a witch, zombie, and fortune teller. Why: Good grief. When: Sat., noon-4 p.m.; trick-or-treating, noon-2 p.m. Where: Winter Garden, The World Financial Center, 220 Vesey St. (212-945-0505).