Peanut butter icing is a smooth, creamy frosting that adds rich, nutty flavor to cakes, cupcakes, brownies, and cookies. It’s easy to make with just a few simple ingredients and tastes amazing on both chocolate and vanilla desserts. The peanut butter gives the icing a slightly salty-sweet taste that pairs perfectly with many baked goods.
This icing is very versatile — you can keep it thick for spreading or add a little extra milk to make it light and fluffy for piping. Whether you’re making a birthday cake, a batch of cupcakes, or just want a delicious topping for brownies, peanut butter icing is a fun and flavorful choice. Plus, it comes together in about 10 minutes, making it perfect for last-minute baking needs!
Ingredients and Substitutions
- ½ cup (113g) unsalted butter, softened – Adds richness and makes the icing smooth.
- 1 cup (240g) creamy peanut butter – Use a good-quality peanut butter for the best flavor.
- 2 cups (240g) powdered sugar – Sweetens and thickens the icing.
- 3–4 tablespoons milk or heavy cream – Adjust for desired consistency.
- 1 teaspoon vanilla extract – Adds a hint of warm flavor.
- Pinch of salt – Balances the sweetness.
Step-by-Step Instructions
Make the Icing
- In a large bowl, beat the softened butter and peanut butter together until creamy and smooth.
- Gradually add the powdered sugar, beating on low speed until combined.
- Add the vanilla extract and a pinch of salt.
- Slowly add the milk, one tablespoon at a time, until you reach your desired consistency.
- Beat the icing for 2–3 minutes on high speed to make it fluffy and light.
Use the Icing
- Spread over cooled cakes, cupcakes, or brownies.
- Use a piping bag for more detailed decorating.
- Add sprinkles, chopped peanuts, or a drizzle of chocolate for extra fun.
Variations and Customizations
- Chunky Peanut Butter: Use chunky peanut butter for a bit of crunch.
- Chocolate Peanut Butter Icing: Mix in 2 tablespoons of cocoa powder for a chocolate twist.
- Extra Light Icing: Use a little extra milk or cream for an airier, whipped texture.
FAQs
Can I make peanut butter icing ahead of time?
Yes! Store it in the fridge for up to 3 days. Let it soften at room temperature before using.
Can I freeze peanut butter icing?
Yes. Freeze in an airtight container for up to 2 months. Thaw and rewhip before using.
Does this icing need refrigeration?
If used on baked goods that will be eaten within a day, no refrigeration is needed. Otherwise, store leftovers in the fridge.