Preheat the oven to 325F (162C) and grease and line four 6 inch cake pans (my pictures show three layers there's enough batter to make four).
In medium bowl, whisk together the flour, baking powder, baking soda, salt and spices until they're evenly distributed.
3 cup (360g) all-purpose flour, spooned and leveled, 1 tsp baking soda, 2 tsp baking powder, 1 tsp fine sea salt, 2 tsp cinnamon, 1 tsp nutmeg, 1 tsp cloves, 1 tsp ginger
In a large bowl, whisk together the eggs, sugar, oil and pumpkin aggressively for 1-2 minutes, until they're well combined.
4 large eggs, 1 cup (200g) granulated sugar, 1 cup (200g) light brown sugar, lightly packed, 1 cup (240mL) canola oil, 1 (15oz) can pumpkin puree
Add the dry ingredients to the wet ingredients and mix until they're well combined.
Distribute the batter evenly among the cake pans and bake for 25-30 minutes, just until the edges release from the pan and/or the center springs back when you press on it gently.
Remove from the oven and flip over onto a tea towel. Allow them to cool completely before frosting.