Banana Smash Cake (For Baby’s First Birthday)
on Mar 12, 2026
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If you’re celebrating your baby’s first birthday and looking for a simple, naturally sweet smash cake, this recipe is for you! This banana smash cake is egg-free, made with wholesome ingredients, and has no added sugar, making it a great option for little ones who are just starting to explore sweets.
The cake is naturally sweetened with ripe bananas and has a soft, tender texture that’s perfect for little hands to grab, squish, and smash. It’s easy to make with simple pantry ingredients and can be baked as a small smash cake for your baby or served as cupcakes. Whether you’re planning a birthday party or a small family celebration, this baby-friendly cake is a fun and stress-free way to celebrate your little one’s big milestone.
Prefer a non-banana-based cake? Try out this almond flour apple smash cake instead!
Table of Contents
Why You’ll Love This Banana Smash Cake
- No added sugar. Sweetened naturally with ripe bananas.
- Soft and moist texture. Perfect for babies to smash and enjoy.
- Simple ingredients. Made with pantry staples you likely already have.
- Quick to prepare. The batter comes together in just a few minutes.
- Great for babies and toddlers. A wholesome cake you can feel good about serving.
What You’ll Need
Here is what you’ll need to make this banana smash cake:
- Bananas: Bananas are the star ingredient in this smash cake. They provide natural sweetness and moisture, and help bind the batter together since this cake does not contain eggs or added sugar.
- Greek Yogurt: Greek yogurt adds moisture, protein, and richness to the cake while helping create a tender crumb. Full-fat Greek yogurt works best in this recipe because it creates a richer and softer cake.
- Milk: Helps thin the batter and creates a soft, moist cake texture.
- Butter/Oil: A small amount of fat helps keep the cake moist and tender.
- Vanilla: Vanilla extract enhances the overall flavor of the cake and complements the sweetness from the bananas.
- All-Purpose Flour: All-purpose flour provides the structure of the cake. It helps the batter hold together while baking and gives the cake its soft crumb. Make sure to measure flour correctly by spooning it into a measuring cup and leveling it off rather than scooping directly from the bag.
- Baking Powder & Baking Soda: Leaveners to help the cake rise.
- Cinnamon & Salt: For added flavor.
See the recipe card below for full information on ingredients and quantities.
Ingredient Substitutions & Additions
- Greek Yogurt: Swap for a thick, Greek-style dairy-free yogurt.
- Milk: Swap whole milk with a dairy-free alternative like oat milk for a dairy-free option.
- All-purpose flour: Swap with 1:1 gluten-free flour to make this cake gluten-free. You can also swap it with white whole wheat flour.
Step-by-Step Instructions
STEP 1: Preheat your oven to 350°F (175°C) and grease two 4-inch cake pans or one 6-inch cake pan.
STEP 2: In a medium bowl, mash the bananas until smooth (Images 1 & 2).
STEP 3: Add the Greek yogurt, milk, melted butter (or oil), and vanilla extract to the mashed bananas (Image 3). Mix until well combined (Image 4).
STEP 4: In a separate bowl, whisk together the flour, baking powder, baking soda, cinnamon, and salt (Images 5 & 6).
STEP 5: Add the dry ingredients to the wet ingredients and gently stir until just combined. Do not overmix (Image 7). Divide the batter evenly between the prepared cake pans (Image 8).
STEP 6: Bake for 30 to 35 minutes, or until the center is set and a toothpick inserted into the center comes out clean. Allow the cakes to cool completely before assembling or frosting.
Frosting Ideas
If you’d like to frost the cake, here are a few baby-friendly options:
Greek Yogurt Frosting
- Plain Greek yogurt
- A splash of vanilla
- Optional: a little mashed banana for sweetness
Whipped Cream Frosting
- Heavy cream whipped until soft peaks form
- A small splash of vanilla
If you’d like something slightly sweetened, you can try out this easy maple cream cheese frosting!
Storage Instructions
Store leftover cake in an airtight container in the refrigerator for up to 3 days. You can also freeze unfrosted cake layers for up to 2 months. Allow them to thaw in the refrigerator before serving.
Tips For Success
- Use very ripe bananas. The riper the bananas, the sweeter the cake will be. For a sweeter cake, you can stir in a little maple syrup into the wet ingredients, but the cake will be sweet enough for a baby with overripe bananas.
- Let the cake cool completely before slicing or frosting so that the cake crumb has time to set and that added frosting doesn’t melt.
- Use a serrated knife to slice off the cake dome to form flat layers when layering the cake.
- If making for a party, you can bake the cake a day in advance and store it in the fridge.
- You can leave the cake plain, top it with some berries, or frost it with Greek yogurt, whipped heavy cream, or this easy maple cream cheese frosting.
Recipe FAQs
Two 4-inch cake pans create the perfect small but tall, layered smash cake.
Yes! You can bake the cake 1–2 days in advance. Once the cake has completely cooled, wrap it tightly or store it in an airtight container in the refrigerator. Frost the cake the day you plan to serve it for the freshest texture.
Insert a toothpick into the center of the cake. If it comes out clean or with a few moist crumbs, the cake is done. Because this cake contains bananas, it may look slightly moist even when fully baked.
Other Banana Recipes You’ll Love
Banana Blueberry Oatmeal Muffins
Banana Coconut Cookies
Spinach Banana Muffins
Waffles For Babies (Blueberry Banana Waffles)
If you tried this Banana Smash Cake, please leave a ⭐ star rating and let me know how it went in the comments below! I love hearing from you!
Banana Smash Cake
Equipment
Ingredients
Wet Ingredients
- 2 very ripe bananas
- ¼ cup plain whole milk Greek yogurt
- ¼ cup milk
- 2 tbsp melted butter or oil
- 1 tsp vanilla extract
Dry Ingredients
- 1 cup all purpose flour
- 1 tsp baking powder
- ½ tsp baking soda
- ¼ tsp ground cinnamon
- ⅛ tsp salt
Instructions
- Preheat your oven to 350°F (175°C) and grease two 4-inch cake pans or one 6-inch cake pan.
- In a medium bowl, mash the bananas until smooth.
- Add the Greek yogurt, milk, melted butter (or oil), and vanilla extract to the mashed bananas. Mix until well combined.
- In a separate bowl, whisk together the flour, baking powder, baking soda, cinnamon, and salt.
- Add the dry ingredients to the wet ingredients and gently stir until just combined. Do not overmix. Divide the batter evenly between the prepared cake pans.
- Bake for 30 to 35 minutes, or until the center is set and a toothpick inserted into the center comes out clean. Allow the cakes to cool completely before assembling or frosting.
Notes
- Use very ripe bananas. The riper the bananas, the sweeter the cake will be. For a sweeter cake, you can stir in a little maple syrup into the wet ingredients, but the cake will be sweet enough for a baby with overripe bananas.
- Let the cake cool completely before slicing or frosting so that the cake crumb has time to set and that added frosting doesn’t melt.
- Use a serrated knife to slice off the cake dome to form flat layers when layering the cake.
- If making for a party, you can bake the cake a day in advance and store it in the fridge.
- You can leave the cake plain, top it with some berries, or frost it with Greek yogurt, whipped heavy cream, or this easy maple cream cheese frosting.
