Read the instructions for baking cookies: "Preheat your oven to $180^\circ C$. In a large bowl, cream together 100g butter and 150g sugar until light and fluffy. Beat in one egg, then stir in 1 teaspoon vanilla extract. In a separate bowl, whisk together 200g flour, 1/2 teaspoon baking soda, and a pinch of salt. Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Drop spoonfuls of dough onto a baking sheet. Bake for 10-12 minutes, or until golden brown. Let cool on the baking sheet for a few minutes before transferring to a wire rack." What is the *first* step you should take before mixing any ingredients?
A) Cream butter and sugar.