

Yields:
12 serving(s)
Prep Time:
1 hr
Total Time:
2 hrs 20 mins
Wow everyone this season with a Christmas tree sheet cake! This holly jolly dessert looks impressive, but it's super simple to make. You can stir the vanilla confetti cake batter together by hand, and the decorations are made with buttercream, Christmas sprinkles, and a few fun store-bought candies—no special tools required! The best part is, like other sheet cakes, this is a cinch to transport to a Christmas potluck and even easier to slice and serve a crowd. When you're planning all your holiday desserts, why not celebrate the most wonderful time of the year with the most festive cake of the season?
How do you get the perfect shade of green?
For a rich, vibrant green, try using gel food coloring rather than liquid. The gel is more concentrated, so you'll need less to achieve a deep color. Depending on the shade you're aiming for, adding a touch of blue can help create that beautiful evergreen hue.
How do you make the tree on this sheet cake?
Start by outlining the shape of a triangle as a guide, then pipe a line of green buttercream dots along the bottom. Here’s the fun part: Use a small offset spatula or butter knife to drag down on each buttercream dot to create the appearance of branches. Next, pipe another line over the first one and continue dragging down on each dot, working your way up the triangle guide. If you’re not satisfied with how some branches look, no worries—you can easily go back in with your spatula to make adjustments. Finally, decorate your tree with a piped frosting garland and candies!
Can you use other candies to decorate?
Absolutely! Feel free to adorn your tree with cinnamon candies, miniature candy canes, mini gumdrops, or any other treats that catch your eye on the candy aisle.
What's the best way to store a frosted sheet cake?
To avoid smearing the icing, place a second baking sheet upside down over the top to create a “clamshell,” then wrap it in plastic. The wrapped cake can be kept at room temperature for up to three days or in the refrigerator for up to one week.
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Ingredients
For the Cake:
Nonstick baking spray with flour, for the pan
- 2 3/4 cups
all-purpose flour
- 2 tsp.
baking powder
- 1/4 tsp.
baking soda
- 1/2 tsp.
kosher salt
- 2 cups
granulated sugar
- 3
large eggs, at room temperature
- 1 cup
vegetable oil
- 2 tsp.
vanilla extract
- 1 cup
buttermilk, at room temperature
- 1/2 cup
red, green, and white holiday sprinkles
For the Frosting:
- 1 1/2 cups
salted butter (3 sticks), at room temperature
- 1 1/2 lb.
powdered sugar (6 c.)
- 1/4 cup
milk
- 1 Tbsp.
vanilla extract
Forest green gel food coloring, for the frosting
Blue gel food coloring, for the frosting (optional)
- 5
brown mini candy-coated chocolates (about 1/2 tsp.), such as mini M&M's
- 2 Tbsp.
red, green, and white holiday sprinkles
- 30
yellow mini candy-coated chocolates (about 2 tsp.), such as mini M&M's
- 40
red mini candy-coated chocolates (about 2 1/2 tsp.), such as mini M&M's
- 1
(6-in.) piece red sour candy belt
Directions
- Step 1For the cake: Preheat the oven to 350˚F. Spray a 18-by-13-inch half-sheet pan with baking spray.
- Step 2In a medium bowl, whisk together the flour, baking powder, baking soda, and salt.
- Step 3In a large bowl, combine the granulated sugar and eggs and whisk until foamy and lightened in color, 1 to 2 minutes. Whisk in the oil and vanilla. Gradually stir in the flour mixture, alternating with the buttermilk, whisking well after each addition. Fold in the sprinkles.
- Step 4Transfer the batter to the prepared sheet pan and bake until lightly golden and a toothpick inserted in the center comes out clean, about 20 minutes. Allow to cool completely in the pan, at least 1 hour.
- Step 5For the frosting: In a stand mixer fitted with the paddle attachment or in a large bowl with a hand mixer, beat the butter on medium-high speed until light and fluffy, 2 to 3 minutes. Reduce the speed to low and add half of the powdered sugar, mixing until combined. Add the milk and mix to incorporate. Add the vanilla and remaining powdered sugar and mix to incorporate. Increase the speed to medium-high and beat until light and fluffy, about 3 minutes.
- Step 6To decorate: Use an offset spatula or rubber spatula to spread 3 cups of the buttercream in a smooth even layer on the cake. Transfer 1/4 cup of the remaining frosting to a piping bag or zip-top plastic bag and cut off the tip to make a small opening (about ⅛ inch).
- Step 7Add enough green food coloring to the remaining 1 3/4 cups frosting to achieve a deep green shade. To make the frosting a very dark green, you can add a few drops of blue food coloring. Transfer to a piping bag or zip-top plastic bag and cut off the tip to make a slightly larger opening than the other bag (about ¼ inch).
- Step 8Use a ruler and small offset spatula to lightly trace a large triangle on the frosted cake; this will be the body of the tree. Place 3 rows of brown mini candy-coated chocolates centered directly under the triangle to make the trunk (5 chocolates per row). Using the triangle as a guide, use the green buttercream to pipe a row of ¾-inch dots across the bottom of the triangle (right above the trunk). Use a small offset spatula or butter knife to gently drag each frosting dot down and outward, in the shape of a curve; wipe the spatula clean between each swoop. Pipe a second row of dots above the first, keeping within the outline of the triangle. Drag down on each dot, letting it overlap with the first row. Repeat until the entire triangle is filled with rows of green branches.
- Step 9Make a border around the cake with the sprinkles. Use the white icing to pipe small dots across the white icing surrounding the tree, to resemble snow.
- Step 10For the tree garland, use the white icing to pipe swooping lines across the tree. Press the mini yellow candy-coated chocolates sideways into the white lines, roughly 1 inch apart, for Christmas lights. Place the mini red candies flat on the tree, for ornaments.
- Step 11To make the bow, cut the sour candy belt in half lengthwise. Fold one strip in a bow shape, and place on top of the tree. Reserve (or eat!) the remaining strip for another use.
Tip: The unfrosted cake can be baked, wrapped in plastic wrap, and frozen for up to 3 months. The cake can be frosted up to 3 days in advance and kept at room temperature for up to 3 days, or in the refrigerator for up to 1 week.
Tip: For a perfectly centered tree on your cake, position the cake pan so that one of the short sides is facing you. Outline a triangle: Measure the bottom side of the triangle 2 ½ inches up from the bottom of the pan and 2 ½ inches in from either side, and measure the top tip of the triangle 2 inches from the top of the pan.
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