Hi there, Carolyn! We think in terms of appearance it would be OK to use the self-rising flour in your crumb topping but we worry that you would be able to taste the leavener in the topping. We'd suggest either making a half batch or picking up some more flour if you've got the time. Kindly, Morgan@KAF
May 29, 2019 at 9:41am
In reply to So I am making a crumb topping for a coffee cake. It calls for … by Carolyn Young (not verified)