The Lorax's Truffula Trees

Ingredients

• 1 box betty crocker white cake mix
• 1 stick butter, softened
• 3 1/2 cups powdered sugar
• 1 teaspoon vanilla extract
• 2 tablespoons heavy whipping cream
• 10 drops green food coloring
• 1 package pretzel stick rods
• 2 packages cotton candy