Preheat the Oven: Set your oven to 350°F (175°C) to get it nice and warm.
Mix the Dry Ingredients: In a bowl, combine flour, baking soda, cinnamon, and salt. Stir well and set aside.
Cream the Butter and Sugar: In a large bowl, beat the softened butter and brown sugar until fluffy.
Add Eggs and Vanilla: Beat in the eggs one at a time, then add the vanilla extract. Mix until smooth.
Combine Everything: Gradually add the dry ingredients to the wet mixture. Stir until just combined.
Fold in the Goodies: Gently fold in the diced apples and raisins until evenly distributed.
Bake: Pour the batter into a greased cake pan. Bake for about 50-60 minutes or until a toothpick inserted comes out clean.
Cool and Serve: Allow the cake to cool before dusting with powdered sugar. Slice and enjoy!