Soft-chewy Halloween red velvet brimstone cookies with black cocoa marbling, mild cocoa-tang flavor, and dramatic contrast for party-perfect trays.
All-purpose flour 2 cups
Natural cocoa powder 2 tbsp
Black cocoa powder 1–2 tbsp
Unsalted butter, softened 1/2 cup
Granulated sugar 1/2 cup
Light brown sugar 1/3 cup
Egg 1 large
Vanilla extract 1 tsp
Buttermilk or 1 tsp vinegar + 1 tbsp milk
Red food coloring gel as desired (optional)
Baking soda 1/2 tsp
Fine salt 1/2 tsp
White or semi-sweet chocolate chips 3/4 cup
1. Cream butter and sugars until smooth; beat in egg, vanilla, and red color if using.
2. Whisk flour, natural cocoa, baking soda, and salt; fold into wet mixture with buttermilk.
3. Divide out 1/4 of dough; mix in black cocoa to create brimstone swirl.
4. Stir chips into main dough; marble with black cocoa dough sparingly.
5. Chill 30–60 minutes; preheat oven to 350°F and line trays.
6. Scoop 1.5 tbsp mounds; bake 10–12 minutes until edges set, centers soft.
7. Press extra chips on warm cookies; dust a pinch of black cocoa for smoky finish.
8. Cool on tray 20 minutes; store airtight up to 4 days or freeze dough balls.
Skip dye for flavor-first cookies; rely on black cocoa contrast.
For crinkle style, roll balls in powdered sugar before baking.
Bake from frozen: add 2–3 minutes.
Add candy eyes or white chocolate drizzle for party trays.