21.   Add flour to the remainder, and stir until smooth.

22.   Add flour to this mixture and cut in butter by hand to form streusel for topping.

23.   Add flour, and stir with a wooden spoon until smooth.

24.   Add flour, whisking until smooth and thickened.

25.   Add more flour, a tablespoon at a time, if necessary.

26.   Add remaining flour, gently folding it in with a spatula.

27.   Add the flour all at once, whisking until incorporated.

28.   Add the flour and beat until moist clumps begin to form.

29.   Add the flour and beat well.

30.   Add the flour and stir until the mixture just forms a soft ball.