Stir flour, baking soda, and baking powder together in a small bowl.
Beat sugar and butter together in a large bowl with an electric mixer until smooth.
Beat in egg and vanilla.
Gradually Blend in Flour mixture.
Roll dough into walnut size balls and place 2 inches apart onto ungreased baking sheets.
Bake in the preheated oven until edges are just golden, 8 to 10 minutes. Cool on the baking sheets briefly before removing to a wire rack to cool completely.
MALTED BUTTERY FROSTING INSTRUCTIONS:
In the bowl of your stand mixer, beat butter on high until smooth, about 30 seconds. Add in ½ cup of the soda fountain malted milk powder and beat on high until light and fluffy, 1-2 minutes, scraping the bowl as needed.
Add in powdered sugar, one cup at a time, beating on low then increasing speed to high for 1 minute, until smooth.
Add in the vanilla extract and beat until smooth.
Optional to add in more malt powder or powdered sugar, to taste, and beat well before proceeding.
If it’s too thick, add in 1 or 2 Tbsp. of heavy whipping cream.
Once the flavor is well-balanced, frost cooled cookies and add sprinkles. (Optional)