Delightful Leftover Candy Shortbread Bars Recipe - My Homemade Recipe

Ingredients

• 1 1/2 cups (3 sticks) unsalted butter, softened.
• 1/2 cup granulated sugar.
• 2 cups all-purpose flour.
• 1/4 teaspoon salt.
• 1 teaspoon pure vanilla extract.
• 2 cups leftover candy pieces (such as M&M's, chopped peanut butter cups, chopped candy bars, etc.).
• Optional: 1 cup white chocolate chips or chopped white chocolate.