This made a lot of batter. It was a very lumpy batter too. If I make again I won't melt the butter for the crumble - it was more of a dough than a streusel, I had to add another tablespoon of flour to the mixture.
2 cups of flour wasn't enough, dough was still way too sticky. I added at least 1 more cup. I divided the dough into 6 rolls instead of 8. Worked well for French Dip sandwiches.