Reese’s Peanut Butter Cup Mix in a Mug gives you a fast, single-serving chocolate-and-peanut-butter treat with almost no prep. Stir the dry mix together ahead of time, then add a few wet ingredients and microwave when the craving hits.
This mug cake starts with chocolate cake mix and chopped Reese’s Peanut Butter Cup miniatures, so it bakes up sweet, rich, and candy-studded in just one mug. It also makes a clever edible gift when you package the mix in a small bag and tuck it into a mug with a whisk.
The dry mix keeps the recipe flexible because you can portion it in advance for gifting or quick desserts later. Once cooked, serve it right away for the best texture, or refrigerate leftovers promptly since the prepared cake contains egg. If you like easy peanut butter desserts, try Reese’s Peanut Butter Cup Fudge Mix in a Mug, Molten Peanut Butter Lava Fudge Mug Cake, or Peanut Butter Fudge Mix in a Mug.
Reese’s Peanut Butter Cup Mix in a Mug Recipe
You’ll Need:
- 1/3 cup any chocolate flavor cake mix
- 4 Reese’s Peanut Butter Cup Miniatures candies, chopped into pieces
Measure the cake mix and chopped peanut butter cup pieces into a small zip-top bag, seal, and shake to combine. To prepare the mug cake, empty the mix into a mug, add 2 teaspoons oil, 1 tablespoon water, and 1 egg white, then whisk well. Microwave on high for 2 minutes.
Expert Tip: Whisk the batter thoroughly and scrape the bottom corners of the mug so the cake mix fully hydrates. That quick extra step helps prevent dry pockets and gives the finished cake a more even crumb.
To Use:
Empty the prepared mix into a mug, add the oil, water, and egg white, and whisk until smooth. Microwave on high for 2 minutes and serve immediately while the candy pieces are still soft.
Serve this warm straight from the mug as a quick dessert or late-night treat. For an extra-indulgent finish, pair it with a glass of milk or use it as a simple base for a scoop of vanilla ice cream.
If you have leftovers, refrigerate the cooked mug cake within 2 hours and use it within 3 to 4 days because it contains cooked egg, according to FDA egg safety guidance.
💸 Budget101® Price Breakdown: Reese's Peanut Butter Cup Mix in a Mug
Frequently Asked Questions about Reese’s Peanut Butter Cup Mix in a Mug
Yes, but the texture will change. The egg white helps the cake rise and set, so leaving it out usually makes the mug cake denser and a little fudgier. If you need an egg-free version, use a chocolate mug cake formula that is written without egg rather than simply omitting it here.
Use a standard microwave-safe coffee mug with enough headroom for the batter to rise. A larger mug helps prevent overflow and gives you room to whisk thoroughly without spilling.
A rubbery texture usually comes from overmixing after the wet ingredients go in or microwaving too long. Whisk just until smooth, then stop. Since microwave strength varies, start checking at about 1 minute 45 seconds if your microwave runs hot.
Yes. Any chopped chocolate-peanut butter candy with a similar size will work best because it distributes evenly through the batter. Larger candy pieces can sink or create uneven hot spots, so chop them small before adding.
Absolutely. The dry mix is designed for make-ahead use. Portion the cake mix and chopped candy into a small zip-top bag, then tuck it into a mug with the directions attached so the recipient only needs to add oil, water, and egg white.
Because the prepared cake contains egg, refrigerate leftovers within 2 hours and use them within 3 to 4 days. The U.S. Food and Drug Administration gives that timeframe for leftover cooked egg dishes in its egg safety guidance.
It is better to make two separate mugs. Doubling the batter in one mug increases the chance of overflow and uneven cooking, which can leave the center underdone while the edges overcook.
This mug cake pairs well with cold milk, coffee, or a small scoop of vanilla ice cream. If you want to keep the peanut butter theme going, serve it alongside Molten Peanut Butter Lava Fudge Mug Cake for a fun mug dessert night.
You can, but the flavor will be much less like a peanut butter cup. Chocolate cake mix gives the strongest candy-bar flavor, while yellow or white cake mix makes the peanut butter cups stand out more as sweet candy pieces.
Mug cakes are at their best right after cooking because they lose moisture fast as they cool. Serving immediately keeps the crumb softer and the chopped candy slightly melty instead of firm and dry.
Did you make this? Tag @Budget101 on Instagram so we can see your mug cake.
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Reese's Peanut Butter Cup Mix in a Mug
Ingredients
- ⅓ cup any chocolate flavor cake mix
- 4 Reese's Peanut Butter Cup Miniatures candies chopped into pieces
Equipment
Instructions
- Measure the cake mix and chopped peanut butter cup pieces into a small zip-top bag, seal, and shake to combine. To prepare the mug cake, empty the mix into a mug, add 2 teaspoons oil, 1 tablespoon water, and 1 egg white, then whisk well. Microwave on high for 2 minutes.
- Empty the prepared mix into a mug, add the oil, water, and egg white, and whisk until smooth. Microwave on high for 2 minutes and serve immediately while the candy pieces are still soft.
Recipe Size Alteration
💡 If you altered the ingredients above by doubling or tripling the recipe, you may also need to change the pan/dish size and adjust the cook time.
Notes
Prep time is an editorial estimate based on measuring, chopping, bagging, and assembling the mug gift.
For best quality, use the dry gift mix within 1 month if stored sealed in a cool, dry place.
After preparation, refrigerate leftovers promptly and use within 3 to 4 days.
