Step 1: Prepare the Oven and Baking Pan

Preheat your oven to 350°F (175°C).

Grease a 9-inch square baking pan or an equivalent baking dish with butter or nonstick cooking spray. For easier removal, line the bottom with parchment paper, leaving a little overhang on two sides.

Set the prepared pan aside while you make the batter.

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Step 2: Mix the Dry Ingredients

In a medium bowl, whisk together:

• All-purpose flour
• Baking powder
• Baking soda
• Salt
• Pumpkin pie spice
• Ground cinnamon

Whisk until the spices are evenly distributed throughout the flour.

This step helps prevent pockets of baking powder, baking soda, or spices from remaining in the finished cake.

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Step 3: Combine the Pumpkin and Wet Ingredients

In a large mixing bowl, add the pumpkin puree, granulated sugar, brown sugar, eggs, vegetable oil, milk, and vanilla extract.

Whisk until the mixture is smooth and well combined.

The pumpkin gives the cake its beautiful orange color and helps create a soft, moist texture.

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Step 4: Combine Wet and Dry Mixtures

Gradually add the dry ingredients to the pumpkin mixture.

Using a spatula or wooden spoon, gently mix until everything is just combined.

Do not overmix the batter. A few tiny streaks of flour are fine because the batter will continue coming together as you fold it.

Overmixing can make the pumpkin cake dense instead of soft and tender.

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Step 5: Prepare the Crumble Topping

In a separate bowl, combine the flour, brown sugar, cinnamon, pumpkin pie spice, and salt.

Pour in the melted butter and stir with a fork until the mixture forms coarse crumbs.

If using chopped pecans or walnuts, fold them into the crumble mixture.

The crumble should have a mixture of small crumbs and larger chunks. Those larger pieces become deliciously crisp and buttery during baking.

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Step 6: Add the Pumpkin Cake Batter to the Pan

Pour the pumpkin cake batter into the prepared baking pan.

Spread it evenly with a spatula, making sure the batter reaches the corners.

Gently smooth the surface without pressing down too much.

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Step 7: Add the Crumble Topping

Sprinkle the prepared crumble mixture evenly over the entire surface of the pumpkin cake batter.

Make sure to cover the cake from edge to edge.

For an extra generous crumble topping, slightly press some of the larger crumbs together before sprinkling them over the cake.

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Step 8: Bake the Cake

Place the pan in the preheated oven.

Bake for approximately 38–45 minutes, or until the top is golden brown and a toothpick inserted into the center of the cake comes out clean or with a few moist crumbs.

Avoid overbaking because pumpkin cakes can become dry if left in the oven too long.

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Step 9: Check for Doneness

Begin checking the cake around the 38-minute mark.

The cake should look set in the center, while the crumble topping should be lightly golden and fragrant.

A toothpick inserted into the center should not have wet batter attached to it.

If the top is browning too quickly while the center still needs more time, loosely cover the cake with aluminum foil and continue baking.

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Step 10: Cool the Cake

Remove the cake from the oven and place it on a wire rack.

Allow it to cool in the pan for about 15–20 minutes.

This gives the cake time to finish setting and allows the crumble topping to become slightly crisp.

For clean slices, allow the cake to cool further before cutting.

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Step 11: Make the Optional Vanilla Glaze

If you want an extra sweet finish, prepare a simple vanilla glaze.

Whisk together powdered sugar, milk, and vanilla extract until smooth.

Add a tiny amount of milk at a time until you reach your desired consistency.

For a thicker glaze, use less milk. For a thinner drizzle, add a little more.

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Step 12: Drizzle and Serve

Once the cake has cooled slightly, drizzle the vanilla glaze over the crumble topping.

Cut the cake into squares and serve.

 

For the ultimate fall dessert, serve it slightly warm with a scoop of vanilla ice cream or a dollop of whipped cream.