Make sombrero brim: Mix 3/4 pk. of fondant with 2 teaspoons of Gum-Tex; tint light yellow and add ivory to achieve a straw color. Roll out 1/4 in. thick. Using knife, cut an 8 in. circle; reserve excess fondant. Position fondant circle inside cornstarch-dusted mixing bowl. Immediately imprint fondant with narrow end of tip 48, placing imprints close together in vertical and horizontal rows. Let dry.