Preheat oven to 350 degrees F.
Wash the apples, peel and cut into eight equal slices
Unwrap the crescent roll and separate the triangles
Place a piece of apple on each triangle of dough (on a wider side) and roll it in a croissant
Butter a 13 x 9-inch baking dish
In a separate bowl, combine the butter, cinnamon, sugar and vanilla, mix until you get a liquid mixture without lumps and pour over the rolls
Pour soda (7up or Mountain Dew) between rolls (but not over) and bake for 35-45 minutes, or until they become golden brown
Serve immediately with a scoop of vanilla ice cream