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Preheat your oven to 350°F (175°C). Lightly grease a 9x13 inch baking dish with butter.

In a large glass bowl, melt 1 cup of butter (2 sticks). While the butter melts, drain the two 29-ounce cans of sweet potatoes thoroughly.

Add the drained sweet potatoes to the melted butter in the large bowl. Mash the sweet potatoes thoroughly until smooth.

To the mashed sweet potatoes, add 2 teaspoons of vanilla extract, 2/3 cup of milk, and 1 1/3 cups of granulated sugar. Stir well to combine all ingredients.

In a separate small bowl, crack and beat the 4 eggs. Pour the beaten eggs into the sweet potato mixture and stir until they are fully incorporated.

Prepare the pecan crumble topping: In another small bowl, melt 1/2 cup of butter (1 stick). Add 1 1/3 cups of brown sugar, 1 1/3 cups of all-purpose flour, and 1 1/2 cups of chopped pecans to the melted butter. Stir these ingredients together until a crumbly mixture forms.

Pour the sweet potato mixture into the prepared 9x13 inch baking dish, spreading it evenly. Then, sprinkle the pecan crumble topping over the sweet potato layer, ensuring an even coating.

Place the casserole in the preheated oven and bake for 45 minutes.

If desired, remove the casserole from the oven after 30 minutes of baking (leaving 15 minutes remaining), sprinkle marshmallows evenly over the top, and return to the oven to finish baking until golden brown and puffed.

Once baked, remove the casserole from the oven and let it rest for 15 to 20 minutes before serving. This allows it to set and achieve the desired texture.


Preheat your oven to 350°F (175°C). Lightly grease a 9x13 inch baking dish with butter.

In a large glass bowl, melt 1 cup of butter (2 sticks). While the butter melts, drain the two 29-ounce cans of sweet potatoes thoroughly.

Add the drained sweet potatoes to the melted butter in the large bowl. Mash the sweet potatoes thoroughly until smooth.

To the mashed sweet potatoes, add 2 teaspoons of vanilla extract, 2/3 cup of milk, and 1 1/3 cups of granulated sugar. Stir well to combine all ingredients.

In a separate small bowl, crack and beat the 4 eggs. Pour the beaten eggs into the sweet potato mixture and stir until they are fully incorporated.

Prepare the pecan crumble topping: In another small bowl, melt 1/2 cup of butter (1 stick). Add 1 1/3 cups of brown sugar, 1 1/3 cups of all-purpose flour, and 1 1/2 cups of chopped pecans to the melted butter. Stir these ingredients together until a crumbly mixture forms.

Pour the sweet potato mixture into the prepared 9x13 inch baking dish, spreading it evenly. Then, sprinkle the pecan crumble topping over the sweet potato layer, ensuring an even coating.

Place the casserole in the preheated oven and bake for 45 minutes.

If desired, remove the casserole from the oven after 30 minutes of baking (leaving 15 minutes remaining), sprinkle marshmallows evenly over the top, and return to the oven to finish baking until golden brown and puffed.

Once baked, remove the casserole from the oven and let it rest for 15 to 20 minutes before serving. This allows it to set and achieve the desired texture.
