Yesterday was my friend’s mom’s birthday and so of course I offered to bake a cake! All I was told is that she likes chocolate, so I made the best, most chocolatey cake I know: kladdkaka with a dark chocolate and coffee ganache. Kladdkaka, or sticky chocolate cake, is a simple dense chocolate cake that is crispy on top and gooey on the inside. And then the ganache topping is made with just dark chocolate, heavy cream, and a couple tablespoons of strong coffee (which you can skip if you li...