Torta Caprese (Chocolate and Almond Flourless Cake)

"The famous dessert of the Island of Capri I've found, over the years of making this cake, is extremely forgiving. The almond meal, butter, chocolate and sugar should be equal in weight. This is the time to get out the digital scale, as it makes not only preparing this but also remembering it later so easy. I've done this with 85 grams of each and 3 eggs. Or 250 grams of each and 5-6 eggs. Once I only had 125 grams of almond meal and I simply used that as the proportion for the rest of the ingredients, along with 3 eggs. They only change the cake a little in height and size, but each has come out smooth and moist, almost fudgy. And, in fact, the last measurement is my favorite because in an 8 inch round pan, it comes out just over an inch tall, which I think makes for a good-sized sliver. If you like, you can add a splash of rum, some lemon or orange zest or (reminiscent of Elizabeth David's chocolate and almond cake, which closely resembles torta caprese) and a dash of strong coffee. You can also double these ingredients and bake them in a 10 inch pan for a slightly larger cake...."