One-Bowl Peanut Butter Oatmeal Cookies
Chewy and wholesome peanut butter oatmeal cookies made in one bowl, perfect for a quick and satisfying homemade treat. This american-inspired desserts ready in about 22 minutes layers rolled oats, all-purpose flour, baking soda 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 110 calories and feeds 24, 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.
Ingredients
- 1 1/2 cups rolled oats
- 3/4 cup all-purpose flour
- 1/2 tsp baking soda
- 1/4 tsp salt
- 1/2 cup, softened unsalted butter
- 1/2 cup, packed brown sugar
- 1/4 cup granulated sugar
- 3/4 cup creamy peanut butter
- 1 large egg
- 1 tsp vanilla extract
Instructions
- Step 1: Preheat oven to 350°F and line two baking sheets with parchment paper.
- Step 2: In a large mixing bowl, combine 1 1/2 cups rolled oats, 3/4 cup all-purpose flour, 1/2 tsp baking soda, and 1/4 tsp salt, stirring to mix.
- Step 3: Add 1/2 cup softened unsalted butter, 1/2 cup packed brown sugar, 1/4 cup granulated sugar, and 3/4 cup creamy peanut butter to the dry ingredients.
- Step 4: Crack in 1 large egg and add 1 tsp vanilla extract. Using a wooden spoon or electric mixer on low, mix everything together until a sticky dough forms.
- Step 5: Scoop rounded tablespoons of dough onto the prepared baking sheets, spacing about 2 inches apart.
- Step 6: Flatten each cookie slightly with the back of a fork, creating a crisscross pattern.
- Step 7: Bake for 10-12 minutes until the edges are golden and the centers are set.
- Step 8: Remove from oven and let the cookies cool on the baking sheets for 5 minutes before transferring to a wire rack to cool completely.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does One-Bowl Peanut Butter Oatmeal Cookies take to make?
Total time is about 22 minutes (10 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 Peanut Butter Oatmeal 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 Peanut Butter Oatmeal 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 Peanut Butter Oatmeal Cookies for a different number of people?
The recipe is written for 24 servings. Multiply each ingredient by (your serving target / 24). 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 Peanut Butter Oatmeal Cookies?
American 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.
