Lemon Sheet Cake

A from-scratch sheet cake that's moist and fluffy, topped with a classic buttercream with the irresistible taste of fresh lemon.

This lemon sheet cake is easy to make and served right out of the pan. Topped with a from-scratch buttercream frosting with plenty of lemon zest and juice.

3 pieces of square cake on parchment

We all love lemon, and we all love cake. But so many lemon cakes are fancy, layered affairs. Not this one. It’s a simple treat that’s easy to make and easy to serve. You’ll love that there’s plenty of lemon flavor without the need for extracts, gelatin, or anything like that. Just fresh zest and fresh juice.

It’s perfect to serve at any casual get together. (You’ll love pumpkin sheet cake with cream cheese frosting if it’s not lemon season, by the way!)

It’s totally from scratch but still simple. This method uses hot milk and butter for an extra moist cake with great texture. If you’ve never tried it before, you’ll love this technique.

Shall we begin?

Ingredients

butter, lemons, milk, baking powder, flour, eggs, sugar, and vegetable oil on marble

Cake

  • 1 1/4 cups + 2 tableespoon flour
  • 3/4 teaspoon salt
  • 1 teaspoon baking powder
  • 3 large eggs
  • 1 1/4 cups sugar
  • 3/4 cup milk
  • 3 tablespoons butter room temperature, cut into tablespoon pieces
  • 1/4 cup vegetable oil
  • 1 1/2 tablespoons lemon zest
  • 3/4 tablespoon lemon juice
  • 2 drops lemon yellow food coloring (optional)

Lemon Buttercream

  • 3/4 cup unsalted butter softened to room temperature (1.5 sticks) (if you don’t have unsalted butter, just use salted and leave out the salt!)
  • 3 1/3 cups powdered sugar
  • 1 tablespoon lemon zest
  • 1 1/2 tablespoons fresh lemon juice
  • 1 1/2 tablespoons heavy cream
  • pinch salt

Step by step instructions

Making the cake batter

grid of 4 images: cake batter sugar and eggs, hot milk, pouring milk intoo batter, stirring lemon juice and zest in by hand

So if you’ve never made a cake with this method, it’s going to seem a little weird. The method seems strange and it even looks weird pulling it out of the oven. But do not worry! The texture is tender and fluffy and stays moist.

Preheat your oven to 325 degrees and prepare a jelly roll pan with baking spray. (I used an 10 x 15 pan)

We’re going to start by mixing the dry ingredients and setting them aside.

Then beat the eggs and sugar, yes just the eggs and sugar, in a stand mixer using the whisk attachment. Turn it up to medium high and beat until they are fluffy. Lift up the whisk and look for the batter to fall off in thick ribbons.

Next, add those dry ingredients.

And finally comes the weird part. We have to heat milk, just to a simmer. Then remove it from the heat and mix in the butter and vegetable oil, stirring until they are melted and combined.

Finally, add the lemon juice and zest, scraping down the bowl to make sure everything is totally incorporated.

Pour all the batter into the prepared baking sheet, and bake! The cake will take anywhere from 35-45 minutes. It’s ready when a toothpick comes out clean.

Baking and Frosting the Cake

baked cake, ingredients for buttercream, finished buttercream, frosted cake

Let it cool completely, right in the pan. To make the frosting, just dump everything in your mixer bowl and blend. Start slow so you don’t get covered in powdered sugar. Add a bit more sugar or cream until it’s the consistency you like. No need to over-complicate things.

Make sure the cake is cool, spread on the frosting, and you’re done! Cut it up and serve. You could place slices on a serving tray, or be lazy like me and serve it right out of the pan. Isn’t that the point of a sheet cake anyway?

By the way, in the cakes pictures here I used the yellow food coloring, but without it, your cake will just look like a classic yellow cake. Still beautiful!

square piece of lemon sheet cake on white plate

More fresh and springy Desserts

Print the Recipe Here

lemon sheet cake cut into squares

Lemon Sheet Cake With Lemon Buttercream

Print Recipe
A from-scratch sheet cake that's moist and fluffy, topped with a classic buttercream with the irresistible taste of fresh lemon.
Prep Time:30 mins
Cook Time:30 mins
cooling:1 hr
Total Time:2 hrs
Click here to grab a free mini-cookbook with my best seasonal recipes

Ingredients

Cake

  • 1 1/4 cups + 2 tableespoon flour
  • 3/4 teaspoon salt
  • 1 teaspoon baking powder
  • 3 large eggs
  • 1 1/4 cups sugar
  • 3/4 cup milk
  • 3 tablespoons butter room temperature, cut into tablespoon pieces
  • 1/4 cup vegetable oil
  • 1 1/2 tablespoons lemon zest
  • 3/4 tablespoon lemon juice
  • 2 drops lemon food coloring optional

Lemon Buttercream

  • 3/4 cup unsalted butter softened to room temperature (1.5 sticks)
  • 3 1/3 cups powdered sugar
  • 1 tablespoon lemon zest
  • 1 1/2 tablespoons fresh lemon juice
  • 1 1/2 tablespoons heavy cream
  • pinch salt

Instructions

Make the Cake

  • Preheat oven to 325 degrees with a baking rack in the center. Prepare a rimmed jelly roll pan with non-stick spray.
  • Combine the flour, baking powder, and salt in a medium mixing bowl, set aside. Fit your stand mixer with the whisk attachment. Beat the eggs and sugar on medium high speed for 2-3 minutes, or until the mixture is very light and fluffy. Add the dry ingredients and beat until just combined, scraping down the sides if needed.
  • Heat the milk in a small saucepan until just beginning to simmer. Remove from the heat and add the vegetable oil and butter. Stir until the butter melts. Pour the warm milk mixture into the batter. Beat until combined. Add the lemon juice and lemon zest (and food coloring if using) and stir by hand with a spatula.
  • Pour batter into rimmed pan and bake for 35-45 minutes, until a toothpick comes out clean. Allow to cool completely in the pan before frosting.

Make the Lemon Frosting

  • Beat the butter, sugar, lemon juice, lemon zest, salt, and 1 tablespoon of heavy cream using an electric stand mixer. If needed, add the additional 1/2 tablespoon of cream (or more) until frosting is the desired consistency.
  • Frost the cake and serve directly out of the pan. Refrigerate any leftovers.

Notes

A 10 x 15 pan is ideal but a larger one will work too, just stick to the shorter baking time.
Try layering fresh berries on top of the cake just before serving.
 

Nutrition

Calories: 111kcal | Carbohydrates: 17g | Protein: 2g | Fat: 5g | Saturated Fat: 3g | Trans Fat: 1g | Cholesterol: 32mg | Sodium: 155mg | Potassium: 32mg | Fiber: 1g | Sugar: 16g | Vitamin A: 68IU | Vitamin C: 1mg | Calcium: 37mg | Iron: 1mg
Course: Dessert
Cuisine: American
Keyword: lemon cake with lemon buttercream, lemon sheet cake, spring cake recipes
Servings: 16 pieces
Calories: 111kcal
Author: Katie Shaw
Did you make this recipe?Tag me @heartscontentfarmhouse so I can see!
signature with strawberries

Click here to subscribe By on April 10th, 2021

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