← BlogJune 28, 2026

How to Make the Perfect Apple Crisp in a Mug

American · Easy · 8 min · 1 servings

vegetarian
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This warm and comforting apple crisp is made right in a mug using your microwave in just minutes. Tender cinnamon apples topped with a buttery oat crumble make this the easiest single-serve dessert you will ever make.

Why this recipe works

This Apple Crisp in a Mug recipe has been crafted to deliver restaurant-quality results in your home kitchen. At just 8 minutes from start to finish, it fits perfectly into a busy schedule without sacrificing flavor. Each serving comes in at 340 calories with 4g of protein, making it a balanced choice for any meal.

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What you will need

This recipe uses 6 simple ingredients that you can find at any grocery store:

  • 1 medium apple peeled and diced
  • 1 tablespoon brown sugar
  • 0.25 teaspoon cinnamon
  • 3 tablespoons rolled oats
  • 1 tablespoon butter
  • 1 tablespoon brown sugar

Step by step instructions

Step 1: Prepare the Apple Filling

Place diced apple into a large microwave-safe mug and toss with 1 tablespoon of brown sugar and cinnamon until evenly coated.

Step 2: Make the Oat Topping

In a small bowl combine rolled oats, remaining brown sugar, and butter then mix with a fork until the mixture resembles coarse crumbles and butter is evenly distributed.

Step 3: Microwave the Apple Layer

Microwave the apple-filled mug on high for 2 minutes until the apples are soft and bubbling slightly at the edges.

Step 4: Add Topping and Finish

Spoon the oat crumble topping over the cooked apples and microwave for an additional 60 seconds until the topping is set. Serve with a scoop of vanilla ice cream if desired.

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Easy substitutions

Missing an ingredient? Here are some swaps that work perfectly:

  • butter → coconut oil for a dairy-free version of the topping
  • rolled oats → crushed graham crackers for a different crispy topping texture

Common mistakes to avoid

Watch out for these pitfalls that can affect your results:

  • Cutting apple pieces too large which prevents them from cooking through evenly
  • Not covering the mug loosely which can cause the filling to splatter in the microwave

Nutrition facts

Per serving: 340 calories, 4g protein, 52g carbs, 13g fat, 5g fiber.

Ready to cook?

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