In my weekend cooking classes, students will often ask about substituting ingredients. Recipes are just guidelines, I tell them. Use what you like or what you have. Yet, people are often hesitant to change recipes, fearing they will mess them up.
So, below is the recipe I used to create a decadent, sophisticated dessert...with several ideas to change it up. I had some espresso-flavored shortbread cookies I wanted to get rid of, along with some sour cream in the fridge, and several bars of bittersweet chocolate that I got for Christmas. This recipe was developed using the things I had on hand.
I created the chocolate espresso version from a recipe I found on Pinterest from Sally's Baking Addiction.
My cheesecake bars are not at all "skinny," but her recipe was a good one to follow so that I got my ratios correct. Baking is, after all, very much like chemistry. I modify recipes like this all the time. It makes cooking easier, less stressful, and much more fun.