One-Bowl Cinnamon Swirl Snack Cake (Egg-Free Recipe)
Bring the cozy bakery experience home with this fluffy, egg-free one-bowl cinnamon swirl snack cake! Optimized perfectly for an 8x8 pan with no electric mixers required, it features a vanilla base paired with a thick, gooey amber cinnamon ribbon that creates eye-catching swirls throughout the cake.It's an incredibly soft treat that's made with simple ingredient swaps—use coconut sugar or standard granulated sugar, and avocado oil or melted butter to match whatever you have on hand today.
Equipment
- 1 8x8 inch square baking pan
- 1 Large Mixing Bowl
- Whisk or Stainless Steel Fork
- Wooden Spoon or Heat-Safe Silicone Spatula
- Measuring cup and spoons
- Butter Knife for swirling the cinnamon mixture in
Ingredients
The Vanilla Batter Base Ingredients
- 1 1/2 cups All-purpose flour
- 1/2 cup Oat flour
- 2 teaspoons Baking powder
- 1/4 teaspoon Baking soda
- 1/2 cup Coconut sugar or regular granulated white sugar
- 1/4 teaspoon Table salt
- 1 cup Dairy milk or plant-based milk (preferably almond milk)
- 1 teaspoon Apple cider vinegar
- 1/4 cup Avocado oil or melted unsalted butter
- 1 teaspoon Pure vanilla extract
The Cinnamon Swirl Mixture Ingredients
- 2 tablespoons Pure maple syrup
- 1 tablespoon Melted butter or avocado oil
- 1 1/2 tablespoons All-purpose flour
- 1 1/2 teaspoons Ground cinnamon
Glaze Ingredients
- 1/2 cup Powdered sugar
- 1 tablespoon Dairy milk or plant-based milk
- 1 drop Pure vanilla extract
Instructions
- Preheat your oven to 350°F (175°C) and lightly grease your 8x8-inch square baking pan and line it with a parchment paper sling across the middle for clean lifting later. Or you can just grease the pan and omit the parchment paper.
- In a small measuring cup or container, stir together the cup of milk and teaspoon of apple cider vinegar and set it aside to curdle slightly while you're preparing the cake batter.
- In a large mixing bowl, thoroughly whisk together the all-purpose flour, oat flour, baking powder, baking soda, sugar, and salt until completely lump-free.
- Pour your curdled milk liquid, avocado oil, and vanilla extract straight in with the dry flour ingredients.
- Fold gently with a silicone spatula or large mixing spoon just until a thick, uniform vanilla batter forms and no dry flour remains.
- Spoon the thick batter into your prepared baking pan, smoothing out the top surface evenly into the corners.
- In that same empty milk measuring cup, quickly stir together the two tablespoons of maple syrup, one tablespoon of melted butter, one and a half tablespoons of flour, and ground cinnamon until it forms a smooth, thick paste.
- Drop the thick cinnamon paste by the spoonful across the top of your vanilla batter in random pockets.
- Press the tip of a butter knife all the way to the bottom of the pan and draw lazy figure-eight patterns from edge to edge to marble the cinnamon ribbon through the cake layers.
- Slide the pan onto the center rack of your oven and bake at 350°F (175°C) for thirty-five to thirty-seven minutes until the top crust is a light golden brown color.
- Test the center with a toothpick; it should come out completely clean with no wet batter attached.
- Remove from the oven and let the cake cool completely in the pan before lifting it out to drizzle with your glossy glaze. Or just let it cool completely in the pan before drizzling with the glaze.
- Whisk your powdered sugar, tablespoon of milk, and drop of vanilla extract together in a small cup until it forms a thick, glossy consistency, then drizzle generously back and forth over the cooled cake.
Notes
Flexible Sugar & Fat Choices: This recipe is highly customizable! For a warm, caramel depth, stick with golden coconut sugar and avocado oil. For a more traditional coffee-shop style flavor, you can flawlessly swap them for regular white granulated sugar or light brown sugar, and melted unsalted butter. Both plant-based milk and traditional dairy milk work at a one-to-one ratio.
The Sinking Ribbon Solution: Whisking just 1 1/2 tablespoons of all-purpose flour directly into the maple syrup, melted butter, and ground cinnamon transforms the liquid into a thick, cohesive paste. This added structure ensures that when you drop the cinnamon portions across your vanilla batter, the mixture stays perfectly suspended instead of sinking to the bottom of the pan while baking.
Storage Tips: Store any leftover cake in an airtight container at room temperature for up to 2 to 3 days, or keep it in the refrigerator for up to 5 days. If refrigerated, let your slice sit on the counter for 10 minutes before eating to allow the crumb to return to its signature melt-in-your-mouth texture.