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Vanilla Sponge Tray Bake sliced into squares. Covered in sprinkles.

MOIST VANILLA SHEET CAKE (THE BEST!)


5 Stars 4 Stars 3 Stars 2 Stars 1 Star

4 from 3 reviews

  • Author: NIKKI
  • Total Time: 30 min Prep Time + 35 min Bake time = 65 min Total Time
  • Yield: 1 8-inch square cake 1x
  • Diet: Vegan

Description

This moist vanilla sheet cake (the best!) is made from scratch with just a handful of ingredients. It has tender, soft crumb, creamy frosting, and colorful sprinkles. Whether it's a school bake sale, a birthday party, or a treat-yourself moment, this tray bake promises to bring smiles all around.


Ingredients

Scale

250 ml milk of choice (1 cup) I like using almond or soy milk but regular milk is fine.

1 tablespoon white wine vinegar

210 grams of all-purpose flour (1 1/2 cups)

150 grams white granulated sugar (3/4 cup)

2 teaspoons baking powder

1/2 teaspoon baking soda

1/4 teaspoon salt

80 ml vegetable oil (1/3 cup)

1 tablespoon vanilla essence

FOR THE BUTTERCREAM FROSTING

115 g butter, softened (1/2 cup)

250 grams powdered sugar (icing sugar)

2 teaspoons vanilla extract

Sprinkles 🌈


Instructions

Preheat and Prep: Preheat your oven to 350°F (175°C). Grease and flour an 8x8-inch square baking pan or line it with parchment paper for easy removal.

Create Buttermilk: In a small bowl, mix together the milk and white vinegar. Let it sit for a few minutes until it curdles slightly. This homemade buttermilk will add moisture and tenderness to our sponge.

Mix Dry Ingredients: In a large mixing bowl, combine the sifted flour, sugar, baking powder, baking soda, and salt. Whisk them together until well incorporated.

Blend Wet Ingredients: To the bowl of buttermilk, add the vegetable oil and vanilla extract. Whisk until everything is nicely combined.

Combine Wet and Dry: Pour the wet ingredients into the bowl of dry ingredients. Using a spatula or wooden spoon, gently fold until you have a smooth batter. Be careful not to overmix.

Bake: Transfer the batter to the prepared baking pan, spreading it out evenly. Pop it into the preheated oven and bake for 25-30 minutes or until a toothpick inserted into the center comes out clean.

HOW TO MAKE THE FROSTING

Cool and Ice: Once baked, let the cake cool completely in the pan on a wire rack. Meanwhile, prepare the icing by creaming together the softened butter, powdered sugar, and vanilla extract. If the icing seems too thick, add a teaspoon of milk at a time until you reach your desired consistency.

Decorate: Once the cake has cooled, spread the creamy icing over the top and sprinkle those colorful sprinkles!

Slice and Serve: Slice the tray bake into squares.

Notes

Don't Overmix: When combining the wet and dry ingredients, be careful not to overmix the batter. Overmixing can lead to a tough and dense cake. Instead, gently fold the ingredients together until just combined for a tender and fluffy texture.

Properly Prepped Pan: Whether you're greasing and flouring your pan or using parchment paper, make sure it's properly prepped to prevent the cake from sticking. This ensures easy removal.

Cool Completely: Allow the traybake to cool completely in the pan on a wire rack before icing. Rushing this step can cause the icing to melt and slide off the cake.

Icing: If the icing is too thick, it will be difficult to spread, while if it's too thin, it may slide off the cake.

Room Temperature Ingredients: Allow your butter to come to room temperature before using it to make the icing. This helps ensure a smooth texture.

  • Category: Baking, Desserts, Cakes
  • Method: Baking
  • Cuisine: American