No Bake Monster Cookie Bars

Bahan-bahan (16 porsi)

• ½ cup (1 stick) unsalted butter
• ½ cup granulated white sugar
• ¼ cup light brown sugar
• 1 cup creamy peanut butter
• ½ cup all purpose flour
• 1 teaspoon vanilla extract
• 2 cups oats
• ¾ cup M&M's
• 8 ounces dark chocolate chips
• 3 tablespoons heavy whipping cream
• ¼ cup M&M's