Andes Mint Cookie Dough Bars

Ingredients

• 1/2 cup unsalted butter, softened
• 1/4 cup granulated sugar
• 1 teaspoon vanilla extract
• 1/2 cup cocoa powder
• 1/4 teaspoon table salt
• 1/2 cup lightly packed light brown sugar
• 1 tablespoon + 1 teaspoon milk
• 1 cup heat treated flour
• 1 3/4 cup Andes Mint baking chips, divided
• 1 1/2 teaspoons vegetable shortening