Welcome to BuzzFeed's Scientific Journey To The Ultimate Chocolate Chip

You've signed up for this newsletter because you are on the bold quest to make a chocolate chip cookie that is better than any chocolate chip cookie you've ever eaten before. Well, you've come to the right place, because after baking more than 400 cookies and testing every possible variable, we think we've found the most perfect recipe. 🍪 🎉

But that's at the end of this newsletter course! First, we'll take you through our experiment day-by-day, and you can follow along at home and conduct your own experiment. You'll learn something new about baking and also have a a lot of leftover cookies to share with friends or family (or keep for yourself). Make sure you share a photo of your own cookies on Instagram with the hashtag #BFChocolateChipCookie.

By signing up for this newsletter, you'll also get exclusive behind-the-scenes photos of our experiment and extra tidbits of baking knowledge from Jesse Szewczyk, the food writer behind this ambitious challenge. He actually wanted to share a few words with you before the experiments start!

"Thank you so much for signing up for our cookie course! I spent weeks baking chocolate chip cookies in search of the ultimate recipe. I learned a lot along the way (and made some pretty terrible cookies) and am excited to share the tips and tricks I learned!"

Tomorrow, we'll send you a newsletter explaining what happens when you change up the sugar you use in your chocolate chip cookie recipe. For now, get your mixing bowls and spatulas ready, because you're about to be in for a sweet, gooey, wild ride.