Iced Oatmeal Cookies • Kroll's Korner

Ingredients

• 12 Tbsp. butter, unsalted
• 1/2 cup brown sugar, tightly packed (light or dark)
• 1/3 cup white sugar
• 1 large egg, room temperature
• 1 large egg yolk, room temperature
• 1 tsp. vanilla extract
• 1 cup old fashioned oats
• 3/4 cup all-purpose flour, spooned and leveled
• 3/4 cup cake flour, spooned and leveled
• 1 tsp. cornstarch
• 1/2 tsp. baking soda
• 1/2 tsp. baking powder
• 1/2 tsp. salt
• 1 tsp. ground cinnamon
• 1/2 tsp. ground nutmeg
• 1 cup powdered sugar, or more as needed
• 2 Tbsp. milk
• 1/2 tsp. vanilla extract
• pinch of salt