Preheat the oven to 375 degrees F (190 degrees C). Line a cookie sheet with parchment paper.

Toss apple slices with 1 1/2 tablespoons melted butter in a bowl until evenly coated; set aside.

Separate crescent roll dough into 8 triangles. Combine brown sugar and apple pie spice in a small bowl; sprinkle evenly over triangles. Top each triangle with 1 apple slice.

Wrap dough around apple slices, starting at long sides of each triangle; place on the prepared cookie sheet. Brush rolled triangles with remaining 1 1/2 tablespoons melted butter.

Bake in the preheated oven until deep golden brown and apples are softened, 10 to 12 minutes. Cool before serving for 5 minutes.