First Communion Sheet Cake (Printable)

Moist vanilla sheet cake with creamy buttercream and floral decorations, ideal for festive occasions.

# What You Need:

→ Sheet Cake

01 - 2½ cups all-purpose flour
02 - 2½ teaspoons baking powder
03 - ½ teaspoon salt
04 - 1 cup unsalted butter, softened
05 - 2 cups granulated sugar
06 - 4 large eggs, room temperature
07 - 1 tablespoon pure vanilla extract
08 - 1 cup whole milk, room temperature

→ Buttercream

09 - 1½ cups unsalted butter, softened
10 - 6 cups powdered sugar, sifted
11 - ¼ cup whole milk
12 - 2 teaspoons pure vanilla extract
13 - Food coloring (pink, yellow, green, or as desired)

# Directions:

01 - Preheat oven to 350°F. Grease a 9x13-inch baking pan and line with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, and salt.
03 - In a large bowl, beat butter and sugar with an electric mixer until light and fluffy, approximately 3 minutes.
04 - Add eggs one at a time, mixing well after each addition. Mix in vanilla extract.
05 - Add flour mixture in three parts, alternating with milk, beginning and ending with flour. Mix until just combined; do not overmix.
06 - Pour batter into prepared pan. Smooth the top with a spatula.
07 - Bake for 28 to 32 minutes, or until a toothpick inserted in the center comes out clean.
08 - Let cake cool in pan for 10 minutes, then turn out onto a wire rack to cool completely.
09 - Beat butter until creamy. Gradually add powdered sugar, alternating with milk, beating until smooth and fluffy. Mix in vanilla extract.
10 - Divide buttercream into bowls and tint portions with food coloring for flowers and leaves.
11 - Spread a generous layer of plain buttercream over cooled cake for the base.
12 - Fill piping bags fitted with flower and leaf tips with colored buttercream. Pipe flowers and leaves decoratively across the cake, focusing on corners or along the edges for a classic appearance.
13 - Optionally, pipe a cross or add First Communion text with a small round tip.

# Expert Advice:

01 -
  • The crumb is impossibly tender—this isn't a dense sheet cake, it's cloud-soft with vanilla that tastes like celebration.
  • You don't need professional decorating skills; even wobbly flowers look charming when they're piped with your own hands.
  • It feeds a crowd without fussy assembly, and leftovers actually taste better the next day.
02 -
  • Room temperature ingredients are not optional—cold eggs and milk cause lumps and dense crumb that no amount of mixing fixes.
  • Overmixing after adding flour is the fastest way to ruin a tender cake; mix just until streaks of flour disappear, then stop.
  • Gel food coloring is worth seeking out because it won't thin your buttercream like liquid coloring does, and it gives vibrant hues.
03 -
  • Bring all ingredients to room temperature before starting—this single habit transforms your baking and prevents lumpy batters.
  • Invest in gel food coloring and good piping tips; they cost almost nothing but they elevate your decorating from wobbly to worthy.
  • Let your frosted cake sit at room temperature for an hour before serving so the buttercream softens slightly and tastes less waxy on the tongue.
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