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    Home / Keto Pumpkin Spice Mug Cake

    Keto Pumpkin Spice Mug Cake

    Dom Lorenzo
    by Dom Lorenzo
    Updated: Jul 11,2025
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    Jump to Recipe Print Recipe

    Craving a pumpkin dessert that’s quick, easy, and perfect for your sweet tooth? This Pumpkin Spice Mug Cake is a delicious treat that’s ready in minutes. Made with just a few simple pantry ingredients like almond flour, pumpkin puree, and a sprinkle of pumpkin pie spice blend, this pumpkin mug cake captures the cozy flavor of fall. The recipe is keto-friendly, but you can easily adapt it for other dietary preferences or pumpkin recipes. Whip it up whenever you need a sweet treat in a hurry!

    Keto Pumpkin Spice Mug Cake in a white mug alongside a stainless steel spoon.
    Jump to:
    • Preparation and cooking overview
    • Chef's note
    • Ingredients for this Pumpkin Spice Mug Cake Recipe
    • Ingredient substitutions
    • Additional ingredients
    • Cooking tools required
    • How to Make Pumpkin Spice Mug Cake: Step-by-Step Guide
    • Cooking methods
    • Preparation steps
    • Cooking instructions
    • How to make it healthier
    • Time-saving tips
    • What can I prepare ahead of time?
    • Storage and reheating instructions
    • Serving Suggestions
    • Recipe wrap-up and conclusion
    • Frequently asked questions
    • 📖 Recipe

    Preparation and cooking overview

    Preparing this Pumpkin Mug Cake takes only 12 minutes, with a cooking time of 2 minutes in the microwave. You’ll need to mix the dry and wet ingredients in a separate bowl, pour the batter into a 10-ounce microwave-safe mug, and microwave it for the exact time. Enjoy a cozy pumpkin dessert that’s perfect for any time of day.

    • Prep Time: 10 minutes
    • Cooking Time: 2 minutes
    • Total Time: 12 Minutes
    • Difficulty Level: Easy
    • Recipe Makes 1 Serving

    Chef's note

    This Pumpkin Mug Cake is a go-to when you're craving something sweet but don’t want the hassle of a full cake. The addition of pumpkin puree makes the cake moist and flavorful. For an extra indulgence, sprinkle some mini chocolate chips on top or add a dollop of whipped cream. If you have leftover canned pumpkin puree, this is the perfect way to use it up!

    Ingredients for this Pumpkin Spice Mug Cake Recipe

    • 3 tablespoons almond flour
    • 1 tablespoon coconut flour
    • 2 tablespoons pumpkin puree (unsweetened)
    • 1 tablespoon melted butter
    • 1 tablespoon erythritol or preferred keto sweetener
    • ¼ teaspoon baking powder
    • ½ teaspoon pumpkin pie spice
    • 1 large egg
    • ½ teaspoon vanilla extract
    • Pinch of salt

    Ingredient substitutions

    • Butter: Swap with unsalted butter or coconut oil for a dairy-free version.

    Additional ingredients

    • Flavor Boost: Add ¼ teaspoon of ground instant coffee into the batter for a deeper, more complex flavor that pairs well with the pumpkin spice.

    Cooking tools required

    • 10-12 oz microwave-safe mug
    • Fork or small whisk

    Note: If you prefer a larger portion, you can use a 14-ounce microwave-safe mug.

    How to Make Pumpkin Spice Mug Cake: Step-by-Step Guide

    Cooking methods

    • Microwaving

    Preparation steps

    1. Roast the pumpkin with the skin on, scoop out the softened flesh, blend until smooth, and store it in the fridge until ready to use.

    Cooking instructions

    1. Mix the wet ingredients: Add the pumpkin puree, melted butter, egg, and vanilla extract to the dry ingredients in a separate bowl, stirring until smooth and well combined.
    2. Transfer to a mug: Pour the batter into a fresh, microwave-safe mug. To avoid overflow, it's recommended to use a slightly larger mug or microwave in 30-second intervals, checking frequently.
    3. Microwave: Microwave on high for 1 minute and 30 seconds to 2 minutes, depending on your microwave’s power. The cake should be set but still slightly moist in the center.
    4. Cool: Let the mug cake cool for 1-2 minutes before enjoying.

    Chef's pro tip

    A common mistake when making this mug cake is overcooking it in the microwave, which can lead to a dry texture. To avoid this, start checking the cake after 1 minute and cook in 15-second intervals until the center is just set and slightly moist.

    How to make it healthier

    • Reduce sweetener: Cut back on the erythritol for a less sweet cake.
    • Add fiber: Use a flax egg (1 tablespoon ground flax seeds mixed with 3 tablespoons water) to increase the fiber content.

    Time-saving tips

    • Pre-mix dry ingredients: Measure out the dry ingredients ahead of time and store them in a jar. You’ll only need to add the wet ingredients and microwave.
    • Use pre-made pumpkin pie spice mix: A store-bought pumpkin pie spice blend saves time and ensures consistent flavor.

    What can I prepare ahead of time?

    • Dry ingredient mix: Combine all the dry ingredients and store them in a sealed container for future use.

    Storage and reheating instructions

    Storage Instructions

    • Refrigerator: If you don’t finish the entire mug cake, cover it and store it in the fridge for up to 1 day.

    Reheating Best Practices

    • Microwave: Reheat for 15-20 seconds to warm it up without drying it out.

    Serving Suggestions

    This Pumpkin Mug Cake recipe makes 1 serving—perfect for a quick, single-serving treat. Top it with a drizzle of sugar-free syrup or keto-friendly chocolate chips for extra indulgence. You can also serve it with a dollop of whipped cream sweetened with erythritol or a sprinkle of pumpkin pie spice for a seasonal touch.

    Recipe wrap-up and conclusion

    This Pumpkin Spice Mug Cake is a quick and easy way to satisfy your cravings for a warm, pumpkin-flavored dessert. Ready in around 10 minutes, this delicious cake is perfect for any time of day and a great use for leftover canned pumpkin puree. Customize it with your favorite toppings like chocolate chips or whipped cream and enjoy a cozy, seasonal treat anytime.

    Frequently asked questions

    A mug cake is a single-serving cake that is mixed and cooked in a microwave-safe mug. It’s quick to make and doesn’t require an oven.

    Use a 10-12 oz microwave-safe mug to ensure the cake doesn’t overflow while cooking.

    Cook the mug cake for 1 minute and 30 seconds to 2 minutes. Start checking after 1 minute in 15-second increments to prevent overcooking.

    Yes, you can bake it in a preheated oven at 350°F for about 12-15 minutes or use an air fryer for a similar cook time.

    A rubbery mug cake is often the result of overcooking. To avoid this, cook in 15-second increments and check the texture frequently.

    A dense cake could be due to not using enough baking powder or using expired baking powder. Ensure you add ¼ teaspoon of fresh baking powder for the best results.

    Yes, replace the almond flour with sunflower seed flour or all-purpose flour for a nut-free version.

    📖 Recipe

    Keto Pumpkin Spice Mug Cake in a white mug alongside a stainless steel spoon.

    Pumpkin Spice Mug Cake

    This Pumpkin Spice Mug Cake is a warm, moist, and irresistibly delicious treat, perfect for satisfying your sweet cravings in just minutes!
    No ratings yet
    Print Rate Pin Recipe
    Course: Dessert
    Cuisine: American
    Keyword: 15-minute
    Prep Time: 10 minutes minutes
    Cook Time: 2 minutes minutes
    Total Time: 12 minutes minutes
    Servings: 1
    Calories: 332kcal

    Ingredients

    • 3 tablespoons almond flour
    • 1 tablespoon coconut flour
    • 2 tablespoons pumpkin puree unsweetened
    • 1 tablespoon melted butter
    • 1 tablespoon erythritol or preferred keto sweetener
    • ¼ teaspoon baking powder
    • ½ teaspoon pumpkin pie spice
    • 1 large egg
    • ½ teaspoon vanilla extract
    • Pinch of salt
    US Customary - Metric

    Instructions

    Preparation steps

    • For a cleaner presentation, it's recommended to mix the dry ingredients—almond flour, coconut flour, erythritol, baking powder, pumpkin pie spice, and a pinch of salt—in a separate bowl. Then, add the pumpkin puree, melted butter, egg, and vanilla extract to the dry ingredients, stirring until smooth.
    • Once mixed, pour the batter into a fresh, microwave-safe mug. Microwave for 1 minute and 30 seconds to 2 minutes, checking the cake at 15-second increments after the 1-minute mark to ensure it doesn't overcook. Allow the cake to cool for 1-2 minutes before serving.

    Cooking instructions

    • Add the pumpkin puree, melted butter, egg, and vanilla extract to the dry ingredients in a separate bowl, stirring until smooth and well combined.
    • Pour the batter into a fresh, microwave-safe mug. To avoid overflow, it's recommended to use a slightly larger mug or microwave in 30-second intervals, checking frequently.
    • Microwave on high for 1 minute and 30 seconds to 2 minutes, depending on your microwave’s power. The cake should be set but still slightly moist in the center.
    • Let the mug cake cool for 1-2 minutes before enjoying.

    Nutrition

    Nutrition Facts
    Pumpkin Spice Mug Cake
    Amount Per Serving
    Calories 332 Calories from Fat 243
    % Daily Value*
    Fat 27g42%
    Saturated Fat 10g63%
    Trans Fat 0.5g
    Polyunsaturated Fat 1g
    Monounsaturated Fat 5g
    Cholesterol 194mg65%
    Sodium 170mg7%
    Potassium 236mg7%
    Carbohydrates 25g8%
    Fiber 6g25%
    Sugar 3g3%
    Protein 11g22%
    Vitamin A 5259IU105%
    Vitamin C 1mg1%
    Calcium 130mg13%
    Iron 2mg11%
    *

    Nutritional values are estimates only and do not include carbs from sugar alcohols.

    # Hashtag with us!Don't forget to mention @castiron_keto or tag #castironketo on Instagram with your creations! We love seeing what you're making.
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