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½ cup (115 g) unsalted butter, softened
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½ cup (120 g) creamy peanut butter (not natural/runny)
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½ cup (100 g) granulated sugar
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½ cup (100 g) brown sugar, packed
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1 large egg, at room temperature
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1 teaspoon vanilla extract
Optional Add-ins (pick one or mix)
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½–¾ cup chocolate chips
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½ cup raisins or dried cranberries
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½ cup chopped peanuts or other nuts
Step 1 – Preheat and Prep
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Preheat your oven to 180°C / 350°F.
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Line 1–2 baking sheets with parchment paper or a silicone baking mat.
Step 2 – Mix the Dry Ingredients
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In a medium bowl, whisk together:
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Flour
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Rolled oats
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Baking soda
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Baking powder
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Salt
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Set aside—this will be added later.
Step 3 – Cream Butter, Peanut Butter & Sugars
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In a large mixing bowl, beat together:
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Softened butter
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Peanut butter
until smooth and well combined.
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Add the granulated sugar and brown sugar.
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Beat for 2–3 minutes, until the mixture is light and creamy.
This step helps your cookies bake up soft instead of dense.
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Add the egg and vanilla extract, and mix again until smooth.
Step 4 – Combine Wet and Dry
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Pour the dry ingredient mixture into the bowl with the wet ingredients.
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Mix on low speed (or with a spatula) just until the flour and oats are incorporated—do not overmix.
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If you’re using chocolate chips, nuts or dried fruit, fold them in now.
You’ll have a thick, slightly sticky dough.
Step 5 – Chill (Optional but Recommended)
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For thicker, chewier cookies, cover the bowl and chill the dough for 20–30 minutes.
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If you’re in a hurry, you can skip this step, but the cookies may spread a bit more.
Step 6 – Scoop and Shape
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Use a spoon or cookie scoop to portion the dough into balls (about 1½ tablespoons each).
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Place them on the prepared baking sheets, leaving about 5 cm / 2 inches between each cookie.
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Gently press the tops down slightly with your fingers or the back of a spoon to flatten them a bit—they won’t spread as much as plain butter cookies.
Step 7 – Bake
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Bake in the preheated oven for 9–12 minutes, depending on size, until:
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The edges are lightly golden
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The centers still look slightly soft
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Don’t overbake—cookies will continue to firm up as they cool, and peanut butter + oats can dry out quickly if baked too long.
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Let the cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
How to Store
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Once fully cooled, store the cookies in an airtight container at room temperature for up to 5–6 days.
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For longer storage, freeze them in a sealed bag or container for up to 2–3 months.
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You can also freeze scooped balls of dough and bake directly from frozen (add 1–2 minutes to the baking time).
Variations & Ideas
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Peanut Butter Chocolate Chip Oatmeal Cookies:
Add ½–¾ cup chocolate chips to the dough. Classic and always a hit. -
Healthier Swap:
Replace ¼ cup (50 g) sugar with the same volume of honey or maple syrup and increase oats slightly if dough becomes too soft. -
Extra Nutty:
Use crunchy peanut butter and fold in chopped peanuts for more texture. -
Cinnamon Twist:
Add ½ teaspoon ground cinnamon to the dry ingredients for a cozy, spiced version. -
Sandwich Cookies:
Spread a little peanut butter or chocolate spread between two cookies for a fun treat.