Some recipes just make you feel at home. This Garlic Butter Sweet Potato Bake does exactly that creamy, golden, and rich, with the kind of aroma that fills your kitchen and makes everyone hover near the oven. It’s cozy enough for a quiet night in, yet fancy enough to slide onto a holiday table.
Table of Contents
Why This Garlic Butter Sweet Potato Bake Works
The perfect balance of sweet, savory, and creamy flavors
The sweet potatoes soften into buttery layers, each one coated in garlicky cream and thyme. The sweetness of the potato balances the savory garlic and Parmesan beautifully. When baked, the edges caramelize, creating little bites of crisp and creamy comfort.
A simple, reliable recipe for weeknights or holidays
You can pull this dish together in under an hour, but it feels luxurious and slow-cooked. Whether you’re serving roast chicken on a Tuesday or glazed ham on Thanksgiving, this Garlic Butter Sweet Potato Bake fits right in without stress.
Ingredients You’ll Need
Key ingredients and what they do
- Sweet potatoes (3 lb): Naturally sweet base that turns tender and caramelized.
- Heavy cream (1 ½ cups): Adds that rich, velvety texture.
- Butter (½ cup): Infuses the sauce with creamy flavor.
- Garlic (5 cloves): Brings the bold, fragrant edge.
- Fresh thyme (1 tbsp): Adds a soft herbal note that balances the richness.
- Parmesan cheese (⅓ cup): Creates that perfect golden crust.
- Cornstarch (1 tsp): Helps the sauce thicken without separating.
- Salt and pepper: Brings all the flavors together.
Recommended tools and baking dish size
You’ll need a sharp knife or mandoline for thin, even slices. A 9×13-inch baking dish works perfectly for even cooking and plenty of room for layering.
How to Make Garlic Butter Sweet Potato Bake
Prep the sweet potatoes for even cooking
Peel and slice your sweet potatoes into ⅛-inch rounds. Thin slices help everything cook evenly and absorb the sauce. If you slice by hand, try to keep them uniform this makes a big difference in texture.
Make the creamy garlic butter sauce step-by-step
In a saucepan over medium-low heat, whisk cornstarch into heavy cream. Add butter, garlic, thyme, salt, and pepper. Stir often until the butter melts and the sauce is smooth. Don’t let it boil gentle heat keeps the garlic mellow and sweet. Let it rest for a minute to thicken slightly.
Layer, bake, and finish with a golden cheesy top
Layer the sweet potato slices in your baking dish, overlapping slightly. Pour the warm garlic cream mixture evenly over the top. Bake uncovered at 375°F for 30 minutes. Then, sprinkle Parmesan on top and bake another 10 minutes until bubbly and golden. If you like a crispier finish, broil for 1–2 minutes, keeping a close eye.
Expert Tips for the Best Results
Ensuring even slicing and seasoning
Thin, consistent slices are key to that perfect tender bite. Lightly salt between layers to build flavor from the bottom up.
Avoiding common mistakes with garlic and cream
Cook the sauce gently too much heat can scorch the garlic or curdle the cream. Letting the sauce rest for a minute before pouring helps it set perfectly while baking.
Getting the perfect cheesy crust
Add the Parmesan near the end so it doesn’t burn. Broiling briefly gives you that irresistible golden top.
Customizations and Substitutions
Dairy swaps and thickening options
Use half-and-half or milk if you want a lighter version. You may need a touch more cornstarch to thicken it. For a nutty note, try Gruyère instead of Parmesan.
Herb and spice variations
If you’re out of thyme, use rosemary or sage. A sprinkle of smoked paprika adds warmth and depth.
Potato and cheese alternatives
You can swap in Yukon gold or russet potatoes for a more traditional flavor. For cheese, cheddar or Romano brings a sharper bite.
Serving Suggestions
Proteins that pair well with this dish
This creamy bake pairs wonderfully with roasted chicken, baked salmon, or grilled steak. It’s also a fantastic side to creamy garlic butter steak and potatoes for a full garlic-lover’s dinner.
Lighter side dishes for balance
Pair it with a crisp salad, roasted Brussels sprouts, or grilled sweet potatoes for a fresh, bright contrast.
Storage and Reheating Guide
How to refrigerate and freeze properly
Let the dish cool completely before covering tightly. It keeps up to 4 days in the fridge. For longer storage, freeze individual portions for up to 3 months.
Best reheating methods to keep it creamy
Cover with foil and bake at 350°F for 15–20 minutes, or microwave single portions with a splash of cream to restore texture.
More Such Recipes
- cheesy ground beef and potato casserole
- ranch garlic parmesan chicken skewers
- creamy tomato white bean stew

Conclusion
This Garlic Butter Sweet Potato Bake brings comfort in every bite sweet, garlicky, and perfectly creamy. Whether it’s a cozy family meal or a holiday feast, it always wins hearts around the table. For more ideas and kitchen inspiration, follow me on Pinterest or join our food family on Facebook.
Garlic Butter Sweet Potato Bake | Simple & Comforting Recipe
- Total Time: 1 hour
- Yield: 6–8 servings 1x
- Diet: Vegetarian
Description
Creamy, garlicky, and golden—this Garlic Butter Sweet Potato Bake is a comforting side dish perfect for both weeknights and holidays.
Ingredients
1 tsp cornstarch
1 1/2 cups heavy cream
1/2 cup (1 stick) butter
5 cloves garlic, finely minced
1 tbsp chopped fresh thyme
Kosher salt, to taste
Freshly cracked black pepper, to taste
3 lb sweet potatoes, peeled and sliced into 1/8-inch thick rounds
1/3 cup fresh parmesan cheese, grated
Instructions
1. Preheat oven to 375°F (190°C) and lightly grease a 9×13-inch baking dish with butter or nonstick spray.
2. In a saucepan over medium-low heat, whisk cornstarch into heavy cream. Add butter, garlic, thyme, salt, and pepper. Stir frequently until butter melts and mixture is hot but not boiling. Remove from heat and let sit briefly.
3. Layer sweet potato slices evenly in the baking dish. Pour the warm garlic cream mixture over the potatoes, covering them fully.
4. Bake uncovered for 30 minutes.
5. Remove from oven, sprinkle parmesan cheese evenly on top, then return to oven and bake another 10 minutes, or until the cheese is golden and bubbly. Optional: broil 1–2 minutes for a crispier top.
6. Let rest for 10 minutes before serving to allow the sauce to thicken.
Notes
Use thin, uniform slices of sweet potato (1/8 inch) to ensure even cooking.
Season between layers for better overall flavor.
Avoid high heat when making the cream sauce to prevent burning the garlic.
Cover the dish during the first part of baking to help the potatoes cook evenly.
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Category: Dinner
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 portion (approx 1/8 of dish)
- Calories: 325
- Sugar: 9 g
- Sodium: 310 mg
- Fat: 22 g
- Saturated Fat: 13 g
- Unsaturated Fat: 7 g
- Trans Fat: 0 g
- Carbohydrates: 28 g
- Fiber: 4 g
- Protein: 3 g
- Cholesterol: 70 mg
