CHOCOLATE CHIP COOKIES IN METRIC
With a bonus for Belgian residents: Belgian ingredient references!
adapted from smitten kitchen's leite's consummare chocolate chip cookie (but see also The Guardian's recent summary; both reference Jacques Torres)
250 grams unsalted butter, room temperature
185 grams light brown sugar (I use cassonade blonde Graeffe)
215 grams white sugar (granulated/caster/sucre fin cristallisé...)
2 large eggs
2 teaspoons vanilla extract (2 cuillère à café; or 10 ml)
260 grams type 00 flour (or white bread flour)
245 grams plain flour (farine patisserie)
1¼ teaspoon baking soda or a 6 grams
1½ teaspoon baking powder or 5 grams
1½ teaspoon salt or 9 grams
100 grams (I use 1 package of Jacques/Callebaut chocolate chips)
Sift together the dry ingredients: the flours, the baking powder and baking soda, and the salt.
In a big mixing bowl, beat the butter with the two sugars until fluffy and light. Add the eggs one at a time, blending each completely. Mix in the vanilla extract.
Stir in the sifted dry ingredients a bit at a time. Get it all blended together but don't overmix.
Stir in the chocolate chips at the end.
Divide dough into thirds or fourths (your choice!) and wrap in wax paper or plastic wrap. Refrigerate for 24, 36, some say up to 72 hours but I've had great results after waiting only 2 so who really knows. The theory is that the dough needs time to rest. In practice this a great way to make baking less onerous by breaking it into parts.... I often make the dough one day and bake the next, as then it doesn't seem so time-consuming. But this is all up to you.
When you're ready to bake, preheat the oven to 180 C and use your preferred method of sheet baking (I line a metal cookie sheet with parchment paper, if you really must know). Place the dough in dollops - a good spoonful, for a decent but not too large cookie - and well-spaced apart. I can usually get a dozen on my standard-size cookie sheet. Bake for about 10 minutes - do check! - and depending on your oven, you may need more. Cookies should be starting to turn golden brown, especially at the edges.
Let them cool on a wire rack until they're not so hot they burn your tongue!
They will keep for several days in an air-tight container, should they last that long.