To make the white buttercream frosting, add butter to the large bowl of an electric mixer and beat on medium speed for about a minute.
Then, add powdered sugar into the bowl, one cup at a time. Keep mixing until fully combined.
Add in the almond extract and heavy whipping cream and beat until light and fluffy. About 2-3 more minutes.
If using gel food color, divide the icing into 3 separate bowls. Keep one white, and then add red food color to one, and then blue food coloring to the other one as well. Mix until color is fully combined.
Use piping bags to frost buttercream onto the top of cupcakes and enjoy!
Store leftover cupcakes in an airtight container for 2-3 days after.