01 -
Pop your softened butter into a mixing bowl and whip it on high until it’s fluffy and pale, about 2-3 minutes. Slowly blend in your powdered sugar on the lowest speed until it looks crumbly. Add the champagne, salt, and vanilla if you're using it; then set your mixer to medium-high and whip for 3-5 minutes until it turns super airy. Add pink gel coloring for a fun pop of color if you like.
02 -
Warm up your oven to 350°F. Prep three 6-inch cake pans with parchment paper at the bottom and a good coating of baking spray or a combo of butter and flour to prevent sticking.
03 -
In a bowl, whisk all your flour, baking powder, and salt together until evenly mixed.
04 -
Beat sugar and softened butter until they’re fluffy, which takes about 2-3 minutes. Add the vanilla extract, then slowly mix in one egg white at a time until they’re combined. Pause to scrape the sides down occasionally.
05 -
Take turns adding your dry flour mix and champagne to the wet batter like this: start with flour, then champagne, followed by more flour, champagne, and end with flour. Mix until it’s just combined. Add a dab of pink coloring after your second round of flour, if desired.
06 -
Split your batter up evenly into the prepared pans, smooth the tops gently, and bake for 25 to 30 minutes. Check with a toothpick—if it comes out with just a few crumbs, you’re good! Let them sit in the pans for 10 minutes before transferring them to a cooling rack to cool down completely.
07 -
When your cake layers are completely cool, stack them up with layers of champagne buttercream in between. Add any extras like white chocolate drip, marshmallow accents, or chocolate-covered strawberries for decoration.