High Protein Pumpkin Mug Cake (No Protein Powder)

This high protein pumpkin mug cake is a warm, single-serve pumpkin spice cake you make in the microwave in about 2 minutes. It has around 16 grams of protein, and none of it comes from protein powder. Greek yogurt does the work instead, which also means no eggs.

Most protein mug cakes lean on a scoop of protein powder and an egg. If you don’t like the taste of protein powder, don’t keep it at home, or simply skip eggs, this one is for you. You need oat flour, pumpkin purée, Greek yogurt, milk and pumpkin pie spice, and you probably have most of it already.

Quick recipe overview

Prep time	3 minutes
Cook time	About 2 minutes
Rest time	1 minute
Total time	About 6 minutes
Servings	1 mug cake
Calories	About 215 per serving
Protein	About 16 g per serving
Dietary	Eggless, vegetarian, no added sugar, no protein powder, nut-free, gluten-free with certified GF oat flour

Why you’ll love this recipe

• About 16 g of protein from Greek yogurt, oat flour and milk, with no protein powder
• Ready in about 6 minutes from mug to spoon
• No eggs, so there is no rubbery, eggy texture
• No added sugar. Monk fruit sweetens it
• Single serve, so there are no leftovers tempting you
• One mug, one spoon for cleanup
• Real pumpkin flavor from purée and pumpkin pie spice

Ingredients

• Oat flour, ⅓ cup (30 g). This is the structure of the cake. Store-bought oat flour gives the most even texture. You can blend old-fashioned oats until fine instead. For a gluten-free cake, buy oat flour labeled certified gluten-free.
• Pumpkin purée, ¼ cup (60 g). Use canned 100% pure pumpkin, not pumpkin pie filling. Pie filling is already sweetened and spiced and will make the cake too sweet and wet.
• Plain nonfat Greek yogurt, ¼ cup (60 g), plus about 2½ tbsp (40 g) for the topping. This is where most of the protein comes from. It also keeps the cake moist and replaces the egg. Choose a thick, plain, unsweetened Greek yogurt. Regular yogurt is thinner and has less protein.
• Milk, 2 tbsp (30 ml). Loosens the batter. Any milk works, including unsweetened almond or soy milk.
• Granulated monk fruit sweetener, 1 to 1½ tbsp. A 1:1 sugar-replacement blend works best. Start with 1 tbsp if you like desserts less sweet.
• Baking powder, ½ tsp. The only leavener, so make sure yours is fresh.
• Pumpkin pie spice, ½ tsp. Gives the classic fall flavor.
• Salt, a pinch. Balances the sweetness.
• Vanilla extract, a drop (optional). For the topping.

Equipment

• Microwave-safe mug that holds at least 12 oz (a glass mug lets you see the rise)
• Small spoon or mini whisk
• Toothpick

How to make high protein pumpkin mug cake

1. Grease the mug. Lightly coat the inside of a 12 oz or larger microwave-safe mug with oil or cooking spray. This helps the cake release cleanly.
2. Mix the dry ingredients. Add the oat flour, baking powder, pumpkin pie spice, monk fruit and salt to the mug. Stir well so the baking powder is evenly spread. Lumps of baking powder taste bitter.
3. Add the wet ingredients. Add the pumpkin purée, ¼ cup Greek yogurt and milk. Stir until no dry flour remains, scraping the bottom of the mug. The batter should be thick but spoonable, like muffin batter. Stop as soon as it is smooth.
4. Microwave. Cook on high for 90 seconds. Then cook in 15-second bursts until the top looks dry and springs back when touched, and a toothpick in the center comes out clean. In a 1000W microwave this takes about 2 minutes total. [CONFIRM AFTER YOUR TEST.]
5. Rest. Let the cake sit for 1 minute. It finishes setting as it cools slightly.
6. Top it. Whisk the remaining Greek yogurt with a little monk fruit and a drop of vanilla. Spoon it on top and dust with a pinch of pumpkin pie spice.

Tips for the best pumpkin mug cake

• Use a big enough mug. The batter rises a lot. A small mug will overflow.
• Don’t overmix. Stir until just combined. Overmixing makes the crumb tough.
• Cook in short bursts. Microwaves vary. The difference between moist and rubbery is often 15 seconds.
• Measure the flour by weight if you can. 30 g is more reliable than a scooped cup.
• Let it rest. Cutting straight in can make the center seem underdone when it is actually setting.
• Eat it warm. Mug cakes are best within a few minutes of cooking.

Common mistakes

Problem	Why it happens	How to fix it
Rubbery, chewy cake	Overcooked or overmixed	Cook in 15-second bursts. Stir only until combined
Wet, gummy center	Undercooked, or the mug is too narrow and deep	Add 15 seconds. Use a wider mug
Batter overflows	Mug too small	Use a mug that holds at least 12 oz
Bitter spots	Baking powder not mixed in	Mix the dry ingredients before adding wet ones
Too sweet	Pumpkin pie filling used instead of purée	Use 100% pure pumpkin purée
Dense, flat cake	Old baking powder	Test it in hot water. It should fizz right away

Substitutions

Original	Substitute	Effect	Recommended?
Oat flour	Blended old-fashioned oats	Slightly coarser crumb	Yes
Oat flour	All-purpose flour (same weight)	Lighter cake, no longer gluten-free	Yes, untested
Oat flour	Almond flour	Denser and moister, different structure	Not without testing
Nonfat Greek yogurt	2% or whole-milk Greek yogurt	Richer, slightly more calories	Yes
Greek yogurt	Regular yogurt	Wetter batter, less protein	No
Monk fruit	Maple syrup, 1 tbsp	Adds sugar, so it is no longer “no added sugar”	Yes, if that’s fine for you
Dairy milk	Unsweetened almond or soy milk	Little change	Yes
Pumpkin pie spice	¼ tsp cinnamon + pinch each of ginger and nutmeg	Similar flavor	Yes

Variations

• Chocolate chip: fold 1 tbsp sugar-free dark chocolate chips into the batter.
• Walnut crunch: sprinkle 1 tbsp chopped walnuts or pecans on top (no longer nut-free).
• Cheesecake swirl: drop the yogurt topping into the center of the batter before cooking.
• Dairy-free: use a thick plant-based Greek-style yogurt and plant milk. Protein will be lower.

Storage

This cake is best eaten fresh and warm. Mug cakes dry out and firm up as they cool, so storing it is not recommended. You can mix the dry ingredients ahead in a jar and keep them in your pantry.

Make-ahead tip

For a fast weekday treat, measure the dry ingredients for several mug cakes into small jars or bags. When you want one, add the pumpkin, yogurt and milk, and microwave.

Serving suggestions

• Top with the Greek yogurt frosting and a dusting of pumpkin pie spice
• Add a drizzle of sugar-free maple syrup
• Serve with a cup of coffee for an afternoon snack
• Pair with fresh apple slices for a fall breakfast

Nutrition information (per serving, with topping)

Nutrient	Amount
Calories	About 215 kcal
Protein	About 16 g
Carbohydrates	About 30 g
Total fat	About 3.5 g
Saturated fat	About 1 g
Fiber	About 5 g
Sugar	About 7 g
Added sugar	0 g
Sodium	About 400 mg

Assumes store-bought oat flour, canned pure pumpkin, plain nonfat Greek yogurt (about 10 g protein per 100 g), 2% milk and zero-calorie monk fruit. Nutrition information is an estimate and may vary depending on the brands and ingredients used.

What makes it high in protein

About two-thirds of the protein comes from Greek yogurt, with the rest from oat flour and milk. The fiber comes from the oats and pumpkin. The sugar is from the natural sugars in pumpkin, yogurt and milk. None is added.

FAQs

Can I make a pumpkin mug cake without protein powder?

Yes. This recipe uses Greek yogurt instead, which gives about 16 g of protein per mug cake.

Is this pumpkin mug cake eggless?

Yes. Greek yogurt replaces the egg and keeps the cake moist.

Is it gluten-free?

Only if you use oat flour labeled certified gluten-free. Regular oats can be cross-contaminated with wheat.

Why is my mug cake rubbery?

It was most likely overcooked or overmixed. Cook in 15-second bursts and stir only until combined.

Why is the middle wet?

It needs a little more time, or your mug is too narrow. Add 15 seconds and test with a toothpick.

Can I bake it in the oven?

You can bake it in an oven-safe ramekin at 350°F (175°C). [TEST AND ADD TIME, OR REMOVE THIS FAQ.]

Can I use pumpkin pie filling?

No. Pie filling is already sweetened and spiced, so the cake will be too sweet and wet.

How can I make it less sweet?

Use 1 tbsp of monk fruit or less. The pumpkin and topping add natural sweetness.

Can I make it ahead?

It is best fresh. You can premix the dry ingredients in jars and add the wet ones when you’re ready.

How much protein is in it?

About 16 g with the yogurt topping, or about 12 g without it.

Final thoughts

When a pumpkin craving hits, this high protein pumpkin mug cake gets you there in minutes without protein powder, eggs or added sugar. Make it once and you’ll know your microwave’s timing for next time.