Cream the room-temperature butter and sugar for about 4-5 minutes until it is creamy and smooth.
¾ cup Butter, ½ cup Sugar
Add in the vanilla extract and mix.
2 teaspoon Vanilla extract
Sift the all-purpose flour, rice flour, and salt over the butter mixture and gently mix all the ingredients until there is no trace of flour.
1 cup Rice flour, 1½ cups All-purpose flour, ½ teaspoon Salt
Grease and line an 8X8-inch brownie pan. Spread the dough in the pan, and use a spatula or your clean hands to spread the dough evenly. Prick the dough with a fork and chill the dough for an hour.
Bake the cookie dough in the 325F oven for 30 to 40 minutes or until the surface turns slightly golden.
After removing the cookies from the oven, prick the surface with a fork again. Let them cool down slightly, then cut them into rectangular or square shapes and let them cool down fully.