One-Bowl Chocolate Monster Cookies

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Thick, chewy chocolate chip cookies packed with peanut butter and oats, ready in under an hour. This recipe, ready in about 27 minutes, layers unsalted butter, brown sugar, peanut butter into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 140 calories and feeds 18, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 12 min Serves 18 Desserts cuisine 140 cal/serving
Build a week of meals around this recipe → Shop this recipe on Instacart → Shop equipment ↓

Ingredients

Affiliate disclosure: AislePrompt may earn a commission on qualifying purchases made through Amazon links, at no additional cost to you. See our policy →

Equipment for this recipe

Top-rated tools to make this recipe successfully.

More Bakeware & baking tools → Shop all kitchen tools →

Instructions

  1. Step 1: Preheat oven to 350°F and line a baking sheet with parchment paper.
  2. Step 2: In a large mixing bowl, cream together 1/2 cup unsalted butter, 3/4 cup brown sugar, and 1/2 cup peanut butter using a hand mixer for 2-3 minutes until light and fluffy.
  3. Step 3: Beat in 1 large egg until fully incorporated.
  4. Step 4: Add 1 cup rolled oats, 3/4 cup all-purpose flour, and 1/2 tsp baking soda, stirring gently just until combined.
  5. Step 5: Fold in 1 cup chocolate chips evenly.
  6. Step 6: Drop rounded tablespoon-sized dough balls onto the prepared baking sheet, spacing them 2 inches apart.
  7. Step 7: Bake for 10-12 minutes, until edges are set but centers remain soft.
  8. Step 8: Cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.

Frequently asked questions

How long does One-Bowl Chocolate Monster Cookies take to make?

Total time is about 27 minutes (15 min prep + 12 min cook). Most home bakers find this fits a weekend afternoon; chill or store as the recipe directs before serving.

How do I store leftover One-Bowl Chocolate Monster Cookies?

Cool fully before storing. Most baked desserts keep at room temperature in an airtight container for 2–3 days, or in the fridge for up to 5 days. Cream- or custard-based desserts must go in the fridge within 2 hours; reheat gently or serve cold per the recipe.

Can I substitute ingredients in One-Bowl Chocolate Monster Cookies?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale One-Bowl Chocolate Monster Cookies for a different number of people?

The recipe is written for 18 servings. Multiply each ingredient by (your serving target / 18). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with One-Bowl Chocolate Monster Cookies?

Desserts desserts like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

What others are saying

Related recipes