Beat the whole milk, sugar, rice flour, coconut milk, eggs, butter, baking powder, and vanilla extract (either with an electric mixer or by hand) until it is thoroughly combined. Then, pour it into your prepped pan. Bake the butter mochi for 1 hour and let it cool completely. Then cut it into 24 squares and serve!
Coat a 9x13-inch baking pan with butter or oil. Melt 1 stick unsalted butter in the microwave or on the stovetop. Prepare the dry and wet ingredients. Place 1 pound mochiko, 2 cups granulated sugar, 2 teaspoons baking powder, and 1/2 teaspoon kosher salt in a large bowl and whisk to combine.
This version of butter mochi uses only coconut milk for its richness and subtle nutty taste, but you can substitute equivalent amounts of whole milk, evaporated milk or a combination of those liquids. Butter mochi develops a crackly top that stays crunchy the day it’s baked, making it a delicious dessert to eat without adornment.
Butter mochi is soft and chewy thanks to Mochiko Flour (also called glutinous rice flour or sweet rice flour). This is a super important ingredient, and no other flour will do! Since we’re using this type of flour, butter mochi is also a gluten-free snack!