Stir together the warm water, yeast, and 2 Tbsp granulated sugar until the yeast is mostly dissolved. Let the mixture stand for about 5 minutes or until a thick layer of foam develops on the surface.

• ½ cup warm water (4 oz. $0.00)
• 2 tsp dry yeast (11.8g, $0.33*)
• 2 Tbsp granulated sugar (25g, $0.05)
• ½ cup brown sugar ((60g) $0.24)
• 1½ cups powdered sugar (187g, $0.44)