Restaurant-Quality Maple-Apple Butter

Place apple slices in a big pot with maple syrup. Bring to a boil and simmer until apples are very tender, about 45 minutes. Mixture will be thick which is what is required to achieve a rich texture as the final result. Remove from heat.

While apples are still hot, add them to a blender with cubes of cold butter, working in small batches so blender is only 1/3 full at a time (for safety reasons so hot mixture won't splatter everywhere). Blend until smooth. Transfer to a bowl and mix until smooth.