Mix 1 can of sweetened condensed milk with ½ c white cake mix in a large glass bowl. Stir well, and divide mixture into two bowls. 

In the first bowl, add the cup of Reese’s peanut butter chips. Microwave the mixture for 1 minute, and then remove and stir well. If the peanut butter chips are not completely melted, return to the microwave for an additional 20 seconds, but be careful not to overheat, or you will scorch the chips. Pour the mixture into the foil lined glass baking dish. Make sure it is smooth, and evenly covers the dish.

In the second bowl, add the semi-sweet chocolate chips. Repeat step 2 of microwaving the chips, and stirring well. Pour the mixture on top of the peanut butter mixture in the foil lined pan. Again, make sure it is smooth, and evenly covers the dish.

While the mixture is still slightly warm, sprinkle the yellow and orange sprinkles, tbsp of semi-sweet and peanut butter chips, and box of Reese’s Pieces on top. Use your fingers and hand to slightly pat down the toppings into the fudge mixture to get them to stick to the top layer. 

Refrigerate for at least 2 hours, or until set. Remove from the foil pan, cut into bars, and enjoy!