Pipe the lines for your stadium in the waffle bowls and let dry 1-2 hours. You can use an edible food marker to draw lines first if you need a guide.

Fill your sections with thinned out "flood" Royal Icing then add sprinkles. Repeat. I did one half of my waffle bowls and propped them up on the side of a plastic bowl to dry for an hour before I did the second half. I'm not sure if this step would be entirely necessary if you took care not to not overfill the sections with the flood icing. Let dry 5 hours or overnight.

When ready to serve scoop out mint chocolate chip ice cream and flatten it slightly.

Using leftover white frosting pipe a field, and add jumbo nonpareil sprinkles for football players or throw some chocolate chips or teddy grahams on top for the same effect. Or just leave it plain.