Can I make this egg‑free or vegan?

Yes. Replace the egg with flax egg (1 tbsp ground flax seed + 3 tbsp water) or store‑bought egg substitute. The cake will be a bit denser, but still tasty and satisfying.

What if I don’t have oat flour?

No problem. Use rolled oats and blend them into a finer texture before mixing. Or use part oat flour, part whole oats to give you texture.

Will it be too sweet if the banana is underripe?

It might feel less sweet. For more natural sweetness, use a very ripe or overripe banana. If still not enough, you could add a splash of pure vanilla extract or a pinch of cinnamon to enhance perception of sweetness.

How do I know when it’s done?

Edges should look set, top lightly golden. The center might still feel a little soft—but not raw. If you touch gently and it springs back slightly, it’s ready. If still runny, microwave 10‑second bursts until cooked.

Banana Oat Mug Cake (No Sugar Added) — Healthy, Fast & Naturally Sweet

Name: Banana Oat Mug Cake (No Sugar Added)
Prep time: 3 min
Cook time: 1 min 30 s
Total time: 5 min
Cuisine: Healthy
Ingredients: 1 medium very ripe banana; ½ cup rolled oats or oat flour; ¼ cup unsweetened almond milk; 1 egg or flax egg (1 tbsp ground flax + 3 tbsp water); ½ teaspoon baking powder; ¼ teaspoon cinnamon (optional); Pinch of salt; Optional: chopped walnuts, dark chocolate chips

Description

This easy Banana Oat Mug Cake recipe is naturally sweet from ripe banana and packed with hearty oats. It’s a healthy, no-sugar-added option for breakfast or a feel-good snack—ready in minutes and full of cozy flavor.

Ingredients

1 medium very ripe banana

½ cup rolled oats or oat flour

¼ cup unsweetened almond milk

1 egg or flax egg (1 tbsp ground flax + 3 tbsp water)

½ teaspoon baking powder

¼ teaspoon cinnamon (optional)

Pinch of salt

Optional: chopped walnuts, dark chocolate chips

Instructions

1. Mash the ripe banana in a microwave-safe mug until smooth.

2. Add oats, almond milk, egg or substitute, baking powder, cinnamon, and salt. Mix well.

3. Fold in optional ingredients like nuts or chocolate chips.

4. Microwave on high for 90 seconds. Check at 60 seconds and continue in 10-second intervals if needed.

5. Let it cool briefly and enjoy your warm banana oat mug cake.

Notes

Use a super ripe banana for maximum natural sweetness.

You can blend rolled oats to create oat flour if desired.

Microwave strength varies. Don’t overcook—start with 60 seconds and check texture.

Perfect for a quick breakfast or afternoon snack.

Prep Time: 3 minutes
Cook Time: 1 minute 30 seconds
Category: Breakfast
Method: Microwave
Cuisine: Healthy

Nutrition

Serving Size: 1 mug
Calories: 290
Sugar: 12g
Sodium: 160mg
Fat: 9g
Saturated Fat: 2g
Unsaturated Fat: 6g
Trans Fat: 0g
Carbohydrates: 40g
Fiber: 5g
Protein: 7g
Cholesterol: 55mg

Keywords: banana mug cake, oat mug cake, no sugar, breakfast