Unbelievably Gooey Banana Peanut Butter Flourless Cake (One Bowl & No Flour!)

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By Gianna Poulef

Gooey Banana Peanut Butter Flourless Cake

Hey there, beautiful baker!
Before we dive into today’s irresistible treat, I just want to say thank you for being here. Seriously — you showing up, apron on, ready to whisk some joy into your day, means the world to me. 💛

Now, I have something special for you — the kind of recipe that feels like a warm hug from the oven. This Banana Peanut Butter Flourless Cake is gooey, nutty, and packed with that nostalgic peanut-butter-banana magic we all adore. And here’s the kicker: it’s made in just one bowl, with zero flour. Yup, you read that right — no flour, no mixer, no stress. Just simple, wholesome ingredients that bake up into a rich, melt-in-your-mouth cake that’s almost too good to share.

Whether you’re baking for Sunday brunch, a cozy movie night, or just because your bananas went brown (we’ve all been there!), this cake will have everyone asking for seconds.

👉 Before you start, don’t forget to subscribe to my newsletter so you never miss another easy, feel-good bake from my kitchen.

Overview of Recipe Content

This is not your average banana cake. Nope — this is the gluten-free, one-bowl, naturally sweetened version that tastes like your favorite peanut butter blondie met a warm banana bread and decided to stay gooey forever.

Why You’ll Love This Cake

  • Only one bowl — because less cleanup = more joy.
  • No flour — almond flour makes it gluten-free and incredibly moist.
  • Peanut butter rich — creamy, nutty perfection in every bite.
  • Naturally sweetened — ripe bananas and honey or maple syrup keep it refined-sugar free.
  • Customizable — add chocolate chips, nuts, or a drizzle of peanut butter topping.
  • Freezer-friendly — perfect for make-ahead snacks or quick desserts.

What It Tastes Like

Imagine banana bread and peanut butter fudge had a baby. It’s soft, moist, slightly chewy around the edges, and so aromatic that you’ll be hovering near the oven waiting for that golden finish.

Each bite bursts with nutty sweetness, creamy texture, and pure comfort.

Health & Nutrition Perks

  • Gluten-free and grain-free (almond flour base)
  • High in protein and healthy fats
  • Naturally sweetened — no refined sugar
  • Packed with potassium, fiber, and vitamin E

Ingredients

This Now, Make It Later!

For the Cake

  • 2 cups (200 g) almond flour
  • 1 tsp (5 g) baking powder
  • ½ tsp (2.5 g) baking soda
  • ¼ tsp (1.5 g) salt
  • 3 ripe bananas, mashed (about 1 cup)
  • ½ cup (120 g) creamy peanut butter (natural preferred)
  • ¼ cup (60 ml) honey or maple syrup
  • 2 large eggs
  • 1 tsp vanilla extract
  • ½ cup (90 g) chocolate chips or chopped peanuts (optional)

For the Gooey Peanut Butter Topping

  • 3 tbsp creamy peanut butter
  • 1 tbsp honey or maple syrup
  • 1 tbsp melted coconut oil (or butter)
  • Pinch of salt
  • Optional: 1 oz melted dark chocolate for drizzle

Tools You’ll Need

  • 1 large mixing bowl
  • 8×8-inch (20×20 cm) baking pan
  • Parchment paper
  • Fork or whisk
  • Spatula
  • Cooling rack

How to Make Banana Peanut Butter Flourless Cake

Step 1: Prep

Preheat your oven to 350°F (175°C). Line your pan with parchment paper — let the edges hang over so you can lift the cake easily later.

Step 2: Mash the Bananas

In a large bowl, mash your ripe bananas with a fork until smooth but slightly chunky for texture. Ripe bananas = natural sweetness and perfect moisture.

Step 3: Add Wet Ingredients

Stir in the peanut butter, honey (or maple syrup), eggs, and vanilla extract. Whisk until the mixture looks creamy and silky.

Step 4: Fold in the Dry Ingredients

Add almond flour, baking powder, baking soda, and salt. Gently mix until everything is just combined — overmixing will make it dense.

If you’re feeling fancy, fold in chocolate chips or chopped peanuts now. (You know I always do!)

Step 5: Bake

Pour your batter into the prepared pan and spread it evenly. Bake for 25–30 minutes, or until the edges are golden and the center is just set. A toothpick should come out with a few moist crumbs — not clean. That’s how you get the gooey magic!

Step 6: Cool and Top

Let the cake cool in the pan for 10–15 minutes, then lift it out using the parchment.

In a small bowl, whisk together peanut butter, honey, and melted coconut oil until smooth. Drizzle it over the slightly warm cake. Add a few swirls of melted dark chocolate if you want to turn it into bakery-level beauty.

Step 7: Slice and Enjoy

Cut into 9 squares and serve warm, room temperature, or even chilled — each texture is its own kind of heaven.

What to Serve with It

  • ☕ A cup of cold brew coffee or creamy latte for contrast.
  • 🍦 A scoop of vanilla or coconut ice cream for dessert nights.
  • 🍓 Fresh strawberries or raspberries for brightness.
  • 🧂 A sprinkle of flaky sea salt on top — trust me, game-changer.

Tips for Making It Perfect

  • Use the ripest bananas you can find — they add sweetness and moisture.
  • Don’t overbake. Pull it out when it’s still slightly underdone in the middle; it finishes cooking as it cools.
  • Line your pan! Almond flour sticks easily.
  • Warm your peanut butter topping slightly before drizzling for a smooth, glossy finish.
  • Make ahead: Bake, cool, slice, and freeze for quick snacks.

Storage Instructions

  • Room Temp: Store in an airtight container for up to 2 days.
  • Fridge: Up to 5 days — keeps it fudgy.
  • Freezer: Freeze slices individually in parchment and thaw as needed. Perfect for emergency sweet cravings!

General Information

This recipe was inspired by my Nana — she loved peanut butter so much she once swirled it into pancake batter “just to see what would happen.” Turns out, peanut butter makes everything better, especially banana cake.

Whether you’re gluten-free or just craving something naturally sweet, this flourless version is proof that wholesome can also mean wildly delicious.

If you’re loving this, you might also enjoy:

Frequently Asked Questions

1. Can I make this cake vegan?
Absolutely! Substitute the eggs with 2 flax eggs (2 tbsp ground flaxseed + 5 tbsp water).

2. Can I use regular flour instead of almond flour?
You can, but it won’t be flourless anymore. Oat flour works best as an alternative.

3. Can I make cupcakes instead?
Yes! Pour the batter into lined muffin tins and bake for 18–20 minutes.

4. How do I make the topping nut-free?
Use sunflower seed butter instead of peanut butter.

5. Can I skip the topping?
Sure — the cake is delicious on its own, but the topping takes it from “yum” to “WOW.”

Conclusion

And there you have it — a Banana Peanut Butter Flourless Cake that’s as easy as it is indulgent. One bowl, no flour, and so much flavor.

Next time your bananas start to spot, don’t toss them — make this gooey, golden beauty instead. I promise it’ll earn a permanent spot in your baking rotation.

If you try it, share your creation on Pinterest (@poulefrecipe) and tag me so I can see your masterpiece! 💛

Until next time — bake with love, laugh often, and never skip dessert.

Nutritional Information (Per Serving)

NutrientAmount
Calories240
Protein8 g
Carbohydrates20 g
Sugars9 g
Fat15 g
Saturated Fat2.5 g
Fiber3 g
Sodium120 mg
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Unbelievably Gooey Banana Peanut Butter Flourless Cake (One Bowl & No Flour!)


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  • Author: Gianna Poulef
  • Total Time: PT40M
  • Yield: 9 servings 1x

Description

This Banana Peanut Butter Flourless Cake is a gooey, one-bowl wonder that needs no flour — just ripe bananas, almond flour, and creamy peanut butter. It’s naturally sweet, tender, and perfect for breakfast, snack time, or a cozy dessert. Top it with a simple gooey peanut butter drizzle (recipe included) for a bakery-level finish.


Ingredients

Scale

For the Cake:

2 cups (200 g) almond flour

1 tsp (5 g) baking powder

½ tsp (2.5 g) baking soda

¼ tsp (1.5 g) salt

3 very ripe bananas, mashed (about 1 cup)

½ cup (120 g) creamy peanut butter (natural preferred)

¼ cup (60 ml) honey or maple syrup

2 large eggs, room temperature

1 tsp vanilla extract

½ cup (90 g) chocolate chips or chopped peanuts (optional)

For the Gooey Peanut Butter Topping:

3 tbsp creamy peanut butter

1 tbsp honey or maple syrup

1 tbsp melted coconut oil (or unsalted butter)

Pinch of flaky sea salt

Optional: 1 oz (28 g) dark chocolate, melted for drizzle


Instructions

1. Preheat the oven to 350°F (175°C). Line an 8×8-inch (20×20 cm) baking pan with parchment paper leaving a slight overhang for easy removal.

2. In a large bowl, mash the ripe bananas with a fork until mostly smooth; a few small lumps are fine and add texture.

3. Add the peanut butter, honey (or maple syrup), eggs, and vanilla extract to the mashed bananas. Whisk until fully combined and silky.

4. Add almond flour, baking powder, baking soda, and salt to the wet mixture. Fold gently with a spatula until just combined — avoid overmixing.

5. Fold in chocolate chips or chopped peanuts if using, reserving a few to sprinkle on top.

6. Pour the batter into the prepared pan and smooth the top with a spatula. Tap the pan gently to release any large air pockets.

7. Bake for 25–30 minutes, or until the edges are golden and a toothpick inserted near the center comes out with a few moist crumbs (not wet batter) — this keeps the cake gooey.

8. While the cake cools slightly (about 10 minutes), make the gooey topping: whisk together peanut butter, honey, and melted coconut oil until smooth. If too thick, add a teaspoon of warm water or milk to loosen.

9. Drizzle the peanut butter topping over the warm cake, then drizzle melted dark chocolate (if using) and sprinkle flaky sea salt.

10. Let the cake cool another 10–15 minutes so the topping firms slightly. Use the parchment overhang to lift the cake from the pan and transfer to a wire rack.

11. Slice into 9 squares. Serve warm (my favorite), at room temperature, or chilled. Store leftovers as directed below.

Notes

Use very ripe bananas — they provide the natural sweetness and moisture this cake needs.

To make vegan: replace eggs with 2 flax eggs (2 tbsp ground flaxseed + 5 tbsp water, let sit for 5 minutes).

Swap peanut butter for almond butter, cashew butter, or sunflower seed butter for a nut-free option.

If your almond flour is coarse, pulse it briefly in a food processor or use blanched almond flour for a finer crumb.

For a loaf pan: bake at 350°F (175°C) for 40–45 minutes; check doneness with a toothpick.

Store in an airtight container at room temperature for up to 2 days, in the fridge up to 5 days, or freeze slices individually for up to 3 months.

  • Prep Time: PT10M
  • Cook Time: PT30M
  • Category: Dessert, Snack
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1 square (about 1/9 of cake)
  • Calories: 240
  • Sugar: 9g
  • Sodium: 120mg
  • Fat: 15g
  • Saturated Fat: 2.5g
  • Unsaturated Fat: 10g
  • Trans Fat: 0g
  • Carbohydrates: 20g
  • Fiber: 3g
  • Protein: 8g
  • Cholesterol: 55mg
Unbelievably Gooey Banana Peanut Butter Flourless Cake (One Bowl & No Flour!)
Gianna Poulef
CEO, Chef & Recipe Creator at BLYNO LLC | Website

I’m Gianna Poulef from Poulef Recipes. I love sharing perfected dishes from my kitchen. I’m sure they’ll earn a spot in your heart. Let’s savor this journey together!.

Let’s be friends!

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