White Sheet Cake

Allergy-Friendly White Sheet Cake: Easy, Versatile, and Perfect for Any Holiday!

If you’re looking for the perfect cake for any holiday, birthday, potluck, or summer cookout—this is it!

This allergy-friendly white sheet cake is not only gluten-free and dairy-free, but it’s also super customizable. Simply switch up the sprinkles on top to match any theme or celebration! Red, white, and blue for the 4th of July, orange and black for Halloween, pastel for Easter—it’s the ultimate blank slate for festive fun.

Plus, it’s easy to make with one bowl, basic pantry ingredients, and no fancy equipment needed.

Why You’ll Love This Cake

✅ Allergy-friendly (gluten-free, dairy-free, egg-free)

✅ Easy to make in one bowl

✅ Stays moist and tender

✅ Perfect for decorating to match any holiday or event

✅ Great for feeding a crowd at a potluck or cookout

Ingredients

2 cups non-dairy milk
2 tablespoons white vinegar
3 cups gluten-free flour (one-to-one blend works best)
1 1/2 cups sugar
2 teaspoons baking powder
1/2 teaspoon baking soda
1 teaspoon salt
2/3 cup canola oil (or other neutral oil)
1 tablespoon vanilla extract

Instructions

1️⃣ Preheat your oven to 350°F (175°C).2️⃣ Line a 9x13-inch baking pan with parchment paper for easy removal.3️⃣ Make the buttermilk: In a small bowl, mix the non-dairy milk and vinegar. Let it sit for a few minutes to curdle slightly.4️⃣ Mix the dry ingredients: In a large mixing bowl, whisk together the gluten-free flour, sugar, baking powder, baking soda, and salt.5️⃣ Add the wet ingredients: Pour in the oil, vanilla, and the milk-vinegar mixture. Whisk until just combined and smooth—don’t overmix.6️⃣ Bake: Pour the batter into the prepared pan. Bake for about 30 minutes, or until the center is set and a toothpick comes out clean.7️⃣ Cool: Let the cake cool in the pan for 20 minutes. Then carefully lift it out using the parchment paper, flip it onto a large platter or board, and peel off the parchment.8️⃣ Trim & Frost: Use a serrated knife to trim the edges if desired for a neat rectangle. Frost the cooled cake (frosting recipe below).9️⃣ Decorate: Add festive sprinkles around the edges to match your holiday or party theme!

Frosting Ideas

You can keep it classic with a simple vanilla buttercream or get creative!

Here’s a basic dairy-free vanilla frosting:

1 cup dairy-free butter (like Earth Balance), softened
4 cups powdered sugar
2–4 tablespoons non-dairy milk
2 teaspoons vanilla extract

Beat the butter until fluffy. Add powdered sugar gradually, alternating with non-dairy milk until you reach a spreadable consistency. Mix in vanilla.

Customization Tips

⭐ Red and green sprinkles for Christmas⭐ Red, white, and blue for Independence Day⭐ Pastel sprinkles for Easter⭐ Orange and black for Halloween⭐ Rainbow sprinkles for birthdays

It’s that easy! Just change the sprinkles to match your event.