Pistachio Muffins (No Pudding Mix)

Ingredients

• 2 cups all-purpose flour
• 2 teaspoons baking powder
• ½ teaspoon salt
• ¾ cup granulated sugar
• 1 lemon (zest and juice, divided)
• 2 large eggs
• ¾ cup whole milk Greek yogurt
• ½ cup whole milk
• ½ cup pistachio butter
• 1 teaspoon vanilla extract
• ½ cup powdered sugar
• 1 tablespoon pistachio butter
• 2 teaspoons milk (as needed)
• Finely ground pistachios for topping