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Preheat your oven to 375°F. Lightly grease a 9x13-inch baking dish.

Place the cubed potatoes in a large pot and cover with cold water. Bring to a boil, then reduce heat and simmer for 5-7 minutes, or until just tender-crisp. Add the broccoli florets to the pot during the last 2 minutes of cooking. Drain well and set aside.

In a large saucepan or Dutch oven, melt the 1/4 cup of unsalted butter over medium heat. Whisk in the all-purpose flour and cook for 1-2 minutes, stirring constantly, to create a roux.

Gradually whisk in the warmed whole milk until smooth. Bring the mixture to a gentle simmer, stirring constantly, until it thickens, about 3-5 minutes. Remove from heat.

Stir in the shredded sharp cheddar cheese, grated Parmesan cheese, Dijon mustard, fresh lemon juice, garlic powder, 1/2 teaspoon salt, and 1/4 teaspoon black pepper until the cheeses are fully melted and the sauce is smooth and creamy. Taste and adjust seasonings if needed.

Gently combine the par-cooked potatoes and broccoli with the cheese sauce in the prepared baking dish, ensuring everything is evenly coated.

In a small bowl, toss the panko breadcrumbs with the 2 tablespoons of melted unsalted butter until evenly coated. Sprinkle the breadcrumb mixture evenly over the potato and broccoli bake.

Bake for 25-30 minutes, or until the bake is bubbly and the topping is golden brown and crispy. If the topping browns too quickly, you can loosely cover it with foil.

Remove from the oven and let it rest for 5 minutes before serving. Garnish with fresh chopped parsley, if desired.


Preheat your oven to 375°F. Lightly grease a 9x13-inch baking dish.

Place the cubed potatoes in a large pot and cover with cold water. Bring to a boil, then reduce heat and simmer for 5-7 minutes, or until just tender-crisp. Add the broccoli florets to the pot during the last 2 minutes of cooking. Drain well and set aside.

In a large saucepan or Dutch oven, melt the 1/4 cup of unsalted butter over medium heat. Whisk in the all-purpose flour and cook for 1-2 minutes, stirring constantly, to create a roux.

Gradually whisk in the warmed whole milk until smooth. Bring the mixture to a gentle simmer, stirring constantly, until it thickens, about 3-5 minutes. Remove from heat.

Stir in the shredded sharp cheddar cheese, grated Parmesan cheese, Dijon mustard, fresh lemon juice, garlic powder, 1/2 teaspoon salt, and 1/4 teaspoon black pepper until the cheeses are fully melted and the sauce is smooth and creamy. Taste and adjust seasonings if needed.

Gently combine the par-cooked potatoes and broccoli with the cheese sauce in the prepared baking dish, ensuring everything is evenly coated.

In a small bowl, toss the panko breadcrumbs with the 2 tablespoons of melted unsalted butter until evenly coated. Sprinkle the breadcrumb mixture evenly over the potato and broccoli bake.

Bake for 25-30 minutes, or until the bake is bubbly and the topping is golden brown and crispy. If the topping browns too quickly, you can loosely cover it with foil.

Remove from the oven and let it rest for 5 minutes before serving. Garnish with fresh chopped parsley, if desired.
