Preheat your oven to 350°F (175°C). In a large mixing bowl, combine the box white cake mix, plain Greek yogurt, and cold water. Mix on medium speed for about 2-3 minutes until smooth.

Divide the batter into three bowls. Keep one bowl white, and add red food coloring to one bowl and blue to the other. Stir until colors are vibrant.

Grease three baking dishes and pour each colored batter into its own dish. Bake for 12-15 minutes or until a toothpick comes out clean. Cool completely.

Crumble each cooled cake layer into a bowl until fine crumbs. Ensure uniformity for nice balls later.

Take about 1-2 tablespoons of each color and roll into balls. Insert a straw or lollipop stick into each ball.

Chill the cake balls on a lined baking sheet in the refrigerator for at least 1 hour.

Melt the white candy melts and vegetable shortening in a microwave-safe bowl. Microwave in 30-second intervals until smooth.

Dip each chilled cake ball into the melted coating, allowing excess to drip back. Sprinkle with red, white, and blue sprinkles before the coating sets.

Chill the cake pops again for 30 minutes to allow the coating to harden.