Baseball Hat Cookie Cups are a fun treat for summer celebrations. They can be made for birthday parties, sports teams and even for Father’s Day. These cookie cups are filled with peanut butter cups and can be easily customized to fit the occasion. For Father’s Day, you could write dad on the front of the hats. For a birthday party, you could put the age of the child. And of course, for your child’s team, you could put the team colors!