Homemade Shamrock Shake

"This easy to make copycat McDonald's Shamrock Shake requires only four ingredients and no blender. There's no need to wait for St. Patrick's Day to come around to snag a delicious Shamrock Shake from McDonald's when you can just make it yourself! This yummy milkshake is the perfect frozen treat for a hot summer day, and because it's so easy to make, you can spend more time with the family and less time in the kitchen!"