Melt the butter over a pan of simmering water and pour it into a 10-12 inch baking pan lined with parchment paper. Alternatively you can use a deep pie dish or a deep rectangular pan. Spread the butter well all around the bottom and the sides of the pan.
Arrange the cookies/ graham crackers on the bottom of the pan in order to cover it completely. You may need to break some or all of them, depending on their shape and the shape of the pan.
Spread evenly the chopped apples on top of the cookies.
In a medium bowl combine flour, baking powder, salt, cinnamon, nutmeg and cloves.
In a mixing bowl whisk eggs and sugar for a few minutes until foamy. Gradually add the flour mixture. Mix gently with a rubber spatula, until homogeneous.
Fold the ground walnuts into the batter.
Pour the batter over the apples. Bake the cake for about 40 minutes or until golden brown.
Serve warm or cold.
Notes
Store the cake for 3 days in the fridge, covered with plastic wrap. You can also freeze it for up to 2 months.
I prefer red apples for this cake (Red Delicious, Gala, Pink Lady) but you can use any kind.
You can use any type of cookies with plain taste or cinnamon flavor: shortbread cookies, petit beurre, nila wafers, digestive biscuits, Biscoff Lotus cookies, snickerdoodles, etc.