Danish Butter

Ingredients

• 1 cup room temperature unsalted butter
• 2/3 cup white sugar
• 1 large egg, at room temperature
• 1 teaspoon vanilla extract
• 2 cups all-purpose flour
• 1/4 teaspoon salt
• 2 teaspoons milk
• 3 oz semi-sweet or milk chocolate, chopped
• 3 tablespoons colorful sprinkles