by hand 10 minutes, adding just enough of remaining 1¼ cups flour until dough is smooth, elastic and slightly sticky; or, knead dough 5 minutes in stand mixer using dough hook on medium speed, adding just enough of remaining 1¼ cups flour until dough is smooth, elastic and slightly sticky.
shape dough into a ball and place in a large, lightly greased bowl; turn to coat. cover bowl with plastic wrap and let dough rise in a warm place 1 to 1½ hours until doubled.
meanwhile, in a medium bowl, combine graham cracker crumbs and sugar for filling/coating. melt butter and place in a small bowl. grease bottom and sides of a 