You can write anything in the instructions as long as you begin with with a number and a dot. Here is a more complete example with grouping shown:
1. Mix flour, water and eggs in a mixing bowl
2. Let the mixture stand for a while
1. Mix icing sugar with egg white
A Note on Grouping: In order for the grouping of ingredients and instructions to show up on the recipes page, please ensure that the group is in both Ingredients and Instructions. For example: if [cupcake] exists in Instructions, [cupcake] must also exist in Ingredients above.