Low-Histamine Sweet Potato Sheet Cake (Vegan, Egg-Free)

If you are looking for a low-histamine cake that doesn’t rely on eggs, dairy, refined sugar, or even added sweeteners, this sweet potato sheet cake might surprise you. Naturally sweet from sweet potato, chestnut flour, and tigernut flour, it has a moist, dense texture and a delicate flavor enhanced by rosemary and warm spices. It’s one of those recipes that proves a nourishing low-histamine cake can be made with just a few wholesome ingredients.

An Easy Low-Histamine Cake

This simple sweet potato sheet cake was born out of a need for a nourishing treat made with ingredients that are generally well tolerated on a low-histamine diet. It is naturally vegan, egg-free, gluten-free, and made without any added sweeteners.

Instead of relying on sugar, cocoa powder, or large amounts of chocolate, this cake gets its flavor from naturally sweet ingredients like sweet potato, chestnut flour, and tigernut flour. A touch of rosemary and allspice adds warmth and depth, while a small sprinkle of dark chocolate on top is optional for those who tolerate it.

The result is a moist, dense snack cake that is satisfying without being overly sweet. It stores beautifully in the refrigerator and freezer, making it a great make-ahead treat to keep on hand.

What’s Special About This Recipe

• Low-histamine friendly (depending on your individual tolerance)
• Vegan and egg-free
• Gluten-free and lectin-friendly
• No refined sugar or added sweeteners
• Made with simple pantry ingredients
• Freezer-friendly

A Few Notes About Low Histamine Eating

Histamine tolerance is highly individual, and there is no universal low-histamine food list. This recipe uses ingredients that many people tolerate well, but your experience may differ.

The dark chocolate topping is completely optional. I personally tolerate small amounts of good-quality dark chocolate, but if you are in a more sensitive phase of your healing journey, simply leave it out.

About the Flours

Chestnut flour and tigernut flour are naturally sweet and flavorful, which is one of the reasons this recipe works without added sweeteners.

I recommend using a combination of both, but if you only have one of them available, you can use the full amount of either flour. The flavor will be slightly different, but the recipe will still work well.

If you don’t have either flour, almond flour may work as an alternative, although I haven’t tested it extensively.

Ingredients

• 1/2 cup chestnut flour
• 1/2 cup tigernut flour
• 1/2 teaspoon cream of tartar
• 1/4 teaspoon baking soda
• 1 cup cooked and mashed sweet potato
• 1/4 cup coconut oil, melted
• 1/4 cup pecan butter
• 1/4 cup extra virgin olive oil
• 1 teaspoon fresh rosemary, finely chopped
• Pinch of allspice
• Pinch of sea salt
• Handful of chopped dark chocolate (optional)

Instructions

Preheat the oven to 350°F (175°C). Line a small square baking pan (about 7-inch / 18 cm) with parchment paper.

In a bowl, whisk together the chestnut flour, tigernut flour, cream of tartar, and baking soda. Add the sweet potato, coconut oil, pecan butter, olive oil, rosemary, allspice, and salt to a food processor. Process until smooth and creamy.

Add the dry ingredients and process again until a thick, sticky batter forms. The batter should be spreadable but quite dense.

Transfer the batter to the prepared pan and smooth the surface with a spatula. If using, sprinkle the chopped dark chocolate evenly over the top. Bake for 20–25 minutes, or until the surface is set and the cake feels firm when lightly touched. Let cool completely before slicing.

Storage

This cake is at its best after chilling. Store it in the refrigerator for up to 3 days.

It also freezes exceptionally well, for longer storage. Slice into squares before freezing, then thaw at room temperature for about 30 minutes before serving.

Variations

• Replace the pecan butter with almond, macadamia, or cashew butter.
• Add orange zest for a brighter flavor.
• Omit the chocolate completely for a fully chocolate-free version.
• Add 1–2 tablespoons cocoa powder or carob powder if you prefer a more brownie-like flavor and tolerate cacao (or carob) well.

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More Low-Histamine Recipes

• Thai Style Curry, Low Histamine
• Chicken and Cabbage Soup. Simple, Soothing, Low Histamine
• Sauteed Cabbage with Fennel and Leeks, Low Histamine

And also, check out my article The Complete Guide to Cooking Low Histamine Recipes, for more tips on cooking low histamine meals.

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