Fill in the 18 paper-lined muffin cups with batter, about 3/4 full. Sprinkle reserved coconut/pecan over the tops. Bake the 12 cup tin first, followed by the remaining 6 separately.
Bake at 425℉ for 5 minutes (set timer). When the timer goes off, reduce temperature to 350℉ and bake an additional 15 minutes. Do not open the oven.
Place muffin tin on cooling rack for about 5 minutes, then remove muffins.
Reset the oven to 425℉. Wait for it to reach temperature before placing the remaining muffins in the oven. Repeat baking directions stated 2 steps above.