Preheat oven to 350°F (175°C). Grease and flour two 8-inch round cake pans.
In a large bowl, mix the vanilla cake mix and orange gelatin until well combined.
Add orange juice, oil, eggs, vanilla extract, and orange zest. Beat until smooth.
Divide batter evenly between pans and bake for 25–30 minutes, until a toothpick comes out clean.
Cool cakes in pans for 10 minutes, then transfer to wire racks to cool completely.
For the frosting, beat butter until fluffy. Gradually add powdered sugar, then heavy cream and orange extract. Beat until smooth.
Assemble by frosting one layer, stacking the second layer, and frosting the outside. This Orange Creamsicle Cake Recipe is now ready to enjoy.