Heat-Treat the Flour: Heat ¼ cup flour at 350°F (175°C) for 5–7 minutes or microwave to 165°F. Let cool.Cream Butter & Brown Sugar: Beat softened butter and brown sugar in a large bowl for 2–3 minutes until creamy.Add Powdered Sugar & Vanilla: Gradually mix in powdered sugar, then 1 tsp vanilla extract, scraping sides occasionally.Add Milk or Cream: Mix 2–4 tbsp milk or cream to reach desired consistency.Add Flour & Chocolate Chips: Fold in heat-treated flour, then fold in mini chocolate chips gently.Frost: Use a spatula or piping bag to frost cupcakes, cakes, or cookies. Customize with sprinkles or candy if desired.