http://www.cookingforengineers.com/recipe/58/Peanut-Butter-C... was the very first thing I ever baked way back when and then I met my now wife and I learned to cook mostly from her.

I started late (late 30's) but it's never too late and this site started me on the road. Now I do the majority of day to day cooking. My wife does most of the baking.

edit: Came back to say https://www.joyofbaking.com/ is/was a site I made a lot of recipes from too.