Combine cooked rice, milk, applesauce, egg, coconut oil, and vanilla in a medium-sized bowl. Whisk until well combined.
Combine remaining pancake ingredients and stir into the brown rice mixture Heat a large nonstick skillet (sprayed with vegetable spray) over medium heat. Pour batter into skillet, about 1/4 cup per pancake.
Flip after 2-3 minutes or when edges start to turn golden and bubbles begin to appear on surface.
Cook another 1-2 minutes on second side until golden.
Top pancakes with butter mixture and cooked apples, if desired.