Preheat oven to 350 Deg f. Brush the wells of a 12 cup muffin pan with the tablespoon or so of melted butter.
In a mixing bowl whisk together the rice flour, sugars, baking powder and salt
In a separate bowl whisk together the melted butter, coconut milk, eggs. Mix the sesame seed paste and honey together then add to the butter mixture and mix well.
Add the butter mixture into the rice flour mixture and stir until combine and no flour streaks remain. Fold in a tablespoon of the sesame seeds into the batter along with 4 tablespoons of the candied yuzu peel ( you can use more yuzu peel if you like).
Divide the batter amongst the 12 cups of the muffin pan. Spinkle the tops with some sesame seeds and add a few pieces of the remaining yuzu peel on top of each mufifin as well. Bake for 45-50 minutes or until a toothpick comes out clean. They need to bake for a long time to fully bake and get that chewy mochi texture inside and crisp exterior. Let cool in the pan for 5 minutes then cool on a wire rack before fully cooling. Best eaten the same day as made. Keep in an airtight container for 2-3 days. You can reheat in the oven to re-crisp the outside. They lose their mochi texture after a few days.