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.
Q: ______,Mix butter and sugar; add eggs one at a time while mixing.,Sift baking powder, flour and salt together, then add slowly while mixing.,Add vanilla.,Preheat oven and start at 300.,Bake for 45 minutes, then decrease oven heat to 250 and bake for 1 1/2 to 2 hours.
A:
Let butter soften.