Caramel Apple Texas Sheet Cake is like fall in a bite, with soft, spiced apple cake topped with a gooey caramel glaze that drips into every nook and cranny. It’s the kind of dessert you bring to a potluck, and by the end, people are not-so-casually scraping the pan for "just one more piece."
In a saucepan, melt butter with water over medium heat. Bring to a gentle boil, then pour into the dry ingredients and mix until smooth.Add eggs, sour cream/buttermilk, and vanilla extract. Mix until combined. Fold in the diced apples.
Pour the batter evenly into the prepared baking sheet and smooth the top. Bake for 20–25 minutes, or until a toothpick inserted in the center comes out clean. Let cool slightly while you make the frosting.
In a medium saucepan or small bowl, melt butter and heavy cream/milk over medium heat or in the microwave.Gradually mix with powdered sugar in a large or medium bowl until smooth and thickened. Stir in vanilla extract and caramel sauce.