Vanilla oil cake uses vegetable oil instead of butter in the batter, which gives a soft, moist crumb that stays tender for days.
Two eight inch layers bake in about thirty five minutes, then stack with a silky vanilla buttercream and a light layer of sprinkles if you like. The method is a simple whisk and pour, so even a first time baker can finish a bakery style cake.
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Why This Vanilla Oil Cake Recipe Works
Oil stays liquid at room temperature, so the crumb feels moist even after the cake has chilled or sat on the counter.
Hot water stirred in at the end thins the batter, which helps the layers bake up tender and level.
The batter mixes in two bowls with a whisk, so there is no creaming step and no stand mixer is required.
Ingredients for Vanilla Oil Cake
- Dry: 2 1/2 cups all purpose flour, 1 3/4 cups granulated sugar, 2 1/2 teaspoons baking powder, and 1/2 teaspoon salt
- Wet: 4 large eggs, 1 cup whole milk, 1 cup vegetable oil, 1 tablespoon vanilla extract, and 1/2 cup hot water
- Buttercream: 1 cup unsalted butter, 4 cups powdered sugar, 1 tablespoon vanilla extract, and 2 to 4 tablespoons milk or cream
- Topping: sprinkles for decorating, optional
Flour and baking powder. Flour provides structure, and baking powder lifts the layers so they rise evenly and bake level.
Eggs and milk. Room temperature eggs and milk blend into the batter smoothly and give an even, tender crumb.
Vegetable oil. A neutral oil keeps the flavor clean and the crumb moist, so the vanilla stays the star.
Hot water. It loosens the batter just before baking, which helps it spread evenly and gives a softer texture.
Butter and powdered sugar. Beaten together until pale, they form a smooth frosting that spreads easily over the cooled layers.
How to Make Vanilla Oil Cake
1. Prepare the pans Set the oven to 350 degrees F, then grease two eight inch round cake pans and line them with parchment paper.
2. Whisk the dry ingredients Whisk the flour, sugar, baking powder, and salt in a large bowl until evenly combined.
3. Mix the wet ingredients Lightly beat the eggs in a medium bowl, then whisk in the milk, oil, and vanilla until smooth.
4. Combine the batter Pour the wet mixture into the dry mixture gradually and whisk until no lumps remain.
5. Add the hot water Stir in the hot water slowly, and the batter will look slightly runny, which is normal.
6. Bake the layers Divide the batter between the pans, smooth the tops, and bake for 30 to 35 minutes, until a toothpick comes out clean or with a few moist crumbs.
7. Cool completely Cool the layers in the pans for 10 minutes, turn them out onto a wire rack, and let them cool fully before frosting.
8. Frost and assemble Beat the butter until pale, add the powdered sugar one cup at a time, then the vanilla and enough milk for a fluffy, spreadable frosting. Spread some between the layers and cover the top and sides.
How to Serve Vanilla Oil Cake
Slice the cake with a warm knife and serve it at room temperature so the frosting stays soft. A cold caramel coffee frappe or a glass of fresh peach lemonade pairs well with each slice. For a dessert table, set the cake beside strawberries and cream cupcakes and a bowl of dark chocolate mousse so guests can pick their favorite.
How to Store and Reheat Vanilla Oil Cake
Store the frosted cake in an airtight container at room temperature for up to three days, or refrigerate it for about a week and let slices come to room temperature before serving. Freeze unfrosted layers wrapped tightly for up to three months and thaw them overnight, then frost on the day you plan to serve. The oil keeps the crumb soft even after chilling.
Tips and Variations for Vanilla Oil Cake
Measure the flour. Spoon flour into the cup and level it so the cake does not turn dense from too much flour.
Do not taste the batter. The batter contains raw eggs and flour, so bake it fully and skip tasting it before it goes in the oven.
Flag the allergens. The cake contains wheat, milk, and egg, and sprinkles may contain other allergens, so check labels.
Use room temperature dairy. Eggs and milk at room temperature blend smoothly, which prevents streaks and gives a more even crumb.
Check with a toothpick. Insert it into the center and look for a clean pick or a few moist crumbs for a tender cake.
Sift the powdered sugar. Sifting removes lumps so the frosting turns out smooth and glossy.
Change the flavor. Add lemon zest to the batter or a spoonful of cocoa to part of the frosting for variety.
Check trusted guidance. For general advice on handling eggs safely when you bake, see the Montana State University Extension egg fact sheet.
Frequently Asked Questions About Vanilla Oil Cake
Why use oil in vanilla oil cake?
Oil is liquid at room temperature, so it keeps the crumb moist and soft even after the cake is chilled.
Can I bake vanilla oil cake in a different pan?
Yes. Use a 9 by 13 inch pan or cupcake liners and adjust the baking time, checking with a toothpick.
Can I freeze vanilla oil cake?
Yes. Wrap the unfrosted layers tightly and freeze them for up to three months, then thaw and frost.
How do I stop the layers from doming?
Bake in the middle of the oven and tap the pans on the counter before baking to release large air bubbles.
Can I use salted butter in the frosting?
Yes, though unsalted butter lets you control the flavor, so taste the frosting before adding any extra salt.
Vanilla Oil Cake with Buttercream Frosting
Equipment
- Two 8 inch round cake pans
- Parchment paper
- Large mixing bowl
- Whisk
- Electric mixer
- Wire rack
Ingredients
Main Ingredients
- 2 cup all purpose flour plus 1/2 cup more
- 1 cup granulated sugar plus 3/4 cup more
- 2 tsp baking powder plus 1/2 tsp more
- ½ tsp salt
- 4 large eggs room temperature
- 1 cup whole milk room temperature
- 1 cup vegetable oil
- 1 tbsp vanilla extract
- ½ cup hot water
- 1 cup unsalted butter room temperature, for the buttercream
- 4 cup powdered sugar sifted
- 1 tbsp vanilla extract for the buttercream
- 2 tbsp milk or cream for the buttercream, add up to 2 tbsp more if needed
Instructions
Cooking
- Prep. Heat the oven to 350 degrees F and line two greased 8 inch pans with parchment.
- Batter. Whisk the dry ingredients, then whisk in the eggs, milk, oil, and vanilla, followed by the hot water.
- Bake. Divide between the pans and bake 30 to 35 minutes until a toothpick comes out clean or with moist crumbs.
- Cool. Cool 10 minutes in the pans, then turn out onto a rack to cool completely.
- Frosting. Beat the butter until pale, then beat in the powdered sugar a cup at a time with the vanilla and milk.
- Assemble. Spread frosting between the layers and over the top and sides.
