Cream b utter till light.
Gradually add in the sugar, until light & fluffy.
To measure butter,(even shortening)
say for 3/4 cup .
Put water in a measuring cup up to the 1-1/4 cup mark, then add butter until the water reaches the 2 cup mark. Be sure to submerge the butter under the water. Then pour off the water, and add your butter to the recipe.!