4-Ingredient Flourless Paleo Banana Cookies

"Here’s a delicious and easy-to-make paleo banana cookie recipe. These cookies are super tasty and their texture is similar to that of sponge cake. I used egg yolks for this recipe, but you can use a whole egg instead, it will work just as well. The reason why I like to make these cookies using egg yolks is that I always have some egg yolks after I make my coconut macaroons, and I don’t know what to do with them. This recipe makes about 8 cookies that are quite big and satisfying."