Butter Mochi Muffins

Name: Butter Mochi Muffins
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: Japanese, Asian, American
Ingredients: 1/4 cup (2 ounces )unsalted butter, melted and cooled, plus more for greasing pans (sub brown-butter ); 2 cups (320 grams) mochiko sweet rice flour (Koda Farms); 1 cup (200 grams) organic dark brown sugar* (light or dark brown sugar will work); 2 teaspoons baking powder; 1/2 teaspoon kosher salt (1/4 tsp sea salt); 1 13 ounce can full-fat coconut milk (Sub evaporated milk, half to all); 2 large eggs (room temperature); 1½ teaspoons vanilla extract; 1 teaspoon molasses (optional, added for flavor or use Golden Syrup or honey); 1½ tablespoons each (black and toasted sesame seeds, for garnish)