Preheat your oven to 350°F (175°C). Grease a 9x9 baking dish with a light layer of oil or line it with parchment paper for easy cleanup.

In a small bowl, mix together 1/4 cup flour, 1/4 cup brown sugar, 1 tsp cinnamon, 1 tsp nutmeg, and 1 tsp pumpkin pie spice. Stir until the mixture is well combined and has a crumbly texture. Set aside for later.

In a medium-sized mixing bowl, whisk together 2 cups of flour, 2 tsp cinnamon, 1 Tbsp pumpkin pie spice, 2 tsp baking powder, and 1/2 tsp salt. This will be the base of your cake, giving it that warm, spiced flavor.

In a separate large mixing bowl, add 1 cup pumpkin puree, 1/4 cup olive oil, 1/4 cup honey, 1/4 cup milk, and 1/4 cup maple syrup. Whisk everything together until the mixture is smooth and fully combined.

Gradually add the dry ingredients into the wet mixture, stirring gently with a spatula or wooden spoon until just combined. Be careful not to overmix, as this can make the cake too dense.

Pour the batter into your prepared baking dish and spread it evenly. Sprinkle the crumb topping over the top, covering the cake batter as evenly as possible for a delicious, spiced crust.

Place the dish in the preheated oven and bake for about 35 minutes, or until a toothpick inserted into the center comes out clean. Every oven is a bit different, so you may want to check for doneness around the 30-minute mark.

Allow the cake to cool slightly before slicing. Serve warm with your favorite coffee or a latte, and enjoy a taste of fall in every bite.