The typo is probably the 1/4 cup flour. I have a recipe that is quite similar that calls for 1 1/2 cups flour along with 1 stick of butter (8 oz) melted. Hope that helps!
Recipe called for 2 1/2 oz. of melted butter in streusel the recipe - if you do that amount you get a liquid mess! I had to add more flour, sugar and added some oats to get near the correct consistency. It probably should have been 2 1/2 T?I also question the directions to do the "toothpick test" for doneness - as it will cause it to be overcooked, as toothpick will not be "clean" due to the cream cheese filling on the toothpick - making you think the dough is still not cooked, and thus it will be cooked too long.
How many eggs for the cake??