Sweet Ice Cream Party Ideas Invitations, favors, and more cool ideas to make your kiddo's summer theme party a blast! Plus, get more easy cake designs and fun birthday party ideas for kids By Kelly Ladd Sanchez SWEET TREAT Bake cupcakes right in flat-bottomed ice cream cones. Scoop 2/3 cup batter into each cone and place them right side up in a high-sided baking pan for 20 minutes at 350°F.