Begin by following the instructions on your cake mix box to whip up a batch of cupcake batter. We used vanilla but you can use any flavor. When they're done, let them cool completely before decorating.
Frost each cupcake with the ready-made frosting giving it a generous swirl with an offset spatial, butter knife or back of a spoon. This acts as the glue for our marshmallow petals.
Take a large marshmallow and cut it in half with scissors. This will give you two petals. Repeat this until you have enough petals for all of your cupcakes. We used 5 per cupcake.
Pour your colored sugar into small bowls. Press the cut side of each marshmallow petal into the colored sugar of your choice to coat it. This is where you can get creative—mix and match colors, or keep it monochromatic.
Arrange the sugared marshmallow petals on top of the frosted cupcakes, sugared side up, to resemble flower petals. Add a colored candy in the center to finish off the flower design.
