Iced Christmas Tree Peanut Butter Cookies

Ingredients

• 3/4 cup Peanut Butter & Co. Smooth Operator
• 1/4 cup unsalted butter, at room temperature
• 1 cup brown sugar
• 1 large egg
• 2 tsp pure vanilla extract
• 1 cup all-purpose flour, plus more to roll out the dough
• 1/2 tsp baking powder
• 1/2 tsp fine salt
• 1 cup powdered sugar
• 2 tbsp water (slightly more or less as needed)
• Colored sugar or sprinkles, for decorating