Step 2: Wrap the Apples
Unroll the crescent dough and separate into triangles. Place 2 apple slices on the wide end of each piece, fold in the sides slightly, and roll up. Place each dumpling seam-side down in a greased slow cooker.
Step 3: Add the Sauce
Mix the melted butter and brown sugar until combined, then pour evenly over the dumplings. Do not stir—this will turn into a caramel sauce as it cooks.
Step 4: Cook
Cover and cook on HIGH for 2 to 2½ hours or LOW for 4 to 4½ hours, until the dumplings are puffed and the sauce is bubbling.