Preheat your oven to 180°C / 350°F. Line the bottom of a 9 x 9 square baking tin with parchment paper, and butter the sides.
In a small bowl, combine two tablespoons of ground flax with one cup unsweetened applesauce and set aside while you're preparing the other ingredients.
In a large bowl, us an electric mixer to cream ½ cup of butter (or vegan alternative) together with ¾ cups sugar until it's light and fluffy, about 1-2 minutes.
Add the applesauce mixture to the butter mixture, and use the electric mixer to mix it in well.
Add one cup all purpose flour, one cup wholegrain spelt flour, 1 teaspoon baking soda, 1 teaspoon salt, ½ teaspoon ground nutmeg, and ¼ teaspoon cloves to the same bowl as the wet mixture.
Use a fork to gently mix the dry ingredients together right on top of the wet mix, and then fold the mixtures together until just combined.
Add ½ cup raisins to the cake batter.
Scrape the batter into the prepared baking pan, and smooth the batter out.
Place in the preheated oven to bake for 30-35 minutes, until a toothpick inserted into the center of the cake comes out clean.
Cool the cake in the pan on a wire wrack. Slice into squares, and serve.