In this task, you will be presented with the directions of a recipe separated by "," and have to fill in the "___" which is a step that is missing from the recipe.

Dissolve yeast in water.,Mix butter, sugar and egg; add yeast mixture.,______,Mix well.,Fill desired number of muffin tins about half full.,Bake at 425 for 20 minutes. Cover tightly and refrigerate unused portion.
Stir in flour gradually.