Sweet Potato Pie Bars Marshmallow

Section: Indulgent Desserts for Sweet Endings

Savor classic autumn flavor in each handheld bar made with velvety sweet potato filling, buttery graham cracker crust, and a gooey toasted marshmallow crown. The bars are easy to make: start by boiling and mashing sweet potatoes, then blend with condensed milk, eggs, and warm spices. Pour the mixture onto a prebaked graham crust, bake until set, chill thoroughly, then smother with mini marshmallows and broil until golden. Each square offers nostalgic holiday aroma and a perfect balance of creamy, spiced filling with crunchy base, ideal for gatherings or cozy treats at home.

A woman wearing a pink apron is cutting a cake.
Published By Evelyn
Updated as of Sat, 18 Oct 2025 01:30:27 GMT
A slice of sweet potato pie bars. Bookmark
A slice of sweet potato pie bars. | foodbymary.com

Sweet potato pie bars are a mashup of graham cracker crust, creamy sweet potato filling, and a toasted marshmallow crown that makes dessert feel like fall in every bite. With simple steps and mostly pantry ingredients, these bars come together in one pan and deliver sweet nostalgia for cozy gatherings or holidays.

I first made these bars for a family fall potluck The tray came home empty and everyone raved Now they are what I bring to Thanksgiving every year

Ingredients

  • Graham cracker crumbs: give a sweet and sturdy base Choose crackers that are crisp and fresh
  • White granulated sugar: adds crunch and balances the crust Check your sugar for no clumps
  • Salted butter melted: binds the crust and makes it rich I love European style for the flavor
  • Sweet potatoes: the hero ingredient Choose ones that feel heavy and look vibrant orange
  • Sweetened condensed milk: gives unbeatable silkiness Always check the use by date
  • Salted butter for the filling: use softened butter to blend everything smoothly Unsalted works too with a pinch of added salt
  • Eggs: hold the filling together Use large eggs for best texture
  • Grated orange zest: brings a little citrus brightness Zest only the orange not the bitter white pith
  • Ground cinnamon ginger and cloves: classic pie spices For bold aroma use the freshest spices you can find
  • Mini marshmallows: finish it off with a gooey toasted top Look for marshmallows that feel soft and pillowy

Step-by-Step Instructions

Cook and cool the sweet potatoes:
Add sweet potatoes to a stockpot with enough water to cover them Place a lid on the pot and bring to a boil Simmer until the potatoes are completely fork tender which usually takes about 15 to 18 minutes Drain and let cool on a plate until safe to handle
Preheat and prep your oven and pan:
Set your oven to 350 degrees Fahrenheit or 180 Celsius Line an eight inch square pan with parchment paper letting some hang over for easy lifting later
Mix up the graham cracker crust:
In a medium bowl combine graham cracker crumbs sugar and melted butter Use a fork or your hands to mix until every crumb is coated and there are no dry bits Press this mixture firmly and evenly into the pan Use the bottom of a measuring cup to smooth it all out
Prebake that crust:
Transfer the pan to the oven and bake for 15 minutes The crust should look set and smell toasty This step helps your bars hold together
Prepare the pie filling:
While the crust is baking scoop cooled sweet potato flesh into a large mixing bowl Add sweetened condensed milk softened butter eggs orange zest cinnamon ginger and cloves Use an electric mixer to blend until it is creamy and free of lumps
Bake the bars:
Once the crust is ready pour the sweet potato filling on top Spread evenly Bake for 35 to 45 minutes Check by poking the center with a skewer If it comes out clean the bars are done
Chill so they firm up:
Cool the bars on the counter until room temperature Then refrigerate for at least four hours This makes slicing neat and easy
Toast the marshmallow topping:
Before serving scatter the mini marshmallows over the chilled bars Place under a broiler for two to three minutes until the marshmallows are golden and melty Watch them the whole time because they brown in a flash
Slice and enjoy:
Use a sharp serrated knife to cut into squares Wipe the blade between cuts for the cleanest bars Serve and watch them disappear in minutes
A slice of sweet potato pie bars. Bookmark
A slice of sweet potato pie bars. | foodbymary.com

My favorite part is always the toasted marshmallow top I am instantly reminded of family camping trips and s'mores The way everyone circles the oven as they brown lets me know dessert will not last long

Storage Tips

To keep sweet potato pie bars fresh store them in the refrigerator Put the uncut pan or sliced bars in a container with a tight lid They stay moist and delicious for up to five days If you plan to freeze skip topping with marshmallows until after thawing then toast fresh for the best texture

Ingredient Substitutions

Swap in gluten free graham crackers for a crust everyone can enjoy If you do not have sweetened condensed milk use evaporated milk with a bit of extra sugar Orange zest is optional but worth it for an added pop Any orange fleshed sweet potato works as long as it is fresh

Serving Suggestions

Show these bars off at potlucks family gatherings or on your holiday table They look lovely next to pumpkin pie or apple crisp For a festive centerpiece I sometimes add a dash of cinnamon on top as the marshmallows cool The flavor is fantastic straight from the fridge or after setting out for half an hour

Sweet potato pie bars with marshmallows on top. Bookmark
Sweet potato pie bars with marshmallows on top. | foodbymary.com

Cultural and Historical Roots

Sweet potato pie is a classic Southern treat especially in autumn Many families also love sweet potato casserole with marshmallows on Thanksgiving These bars bring together both traditions making every bite taste familiar and new all at once

Common Recipe Questions

→ How do I achieve a sturdy graham crust?

Press the graham crumb mixture firmly into the lined pan, then prebake for 15 minutes so the crust holds together in neat bars.

→ Can canned sweet potatoes be used?

Yes, just drain and mash well. Adjust for sweetness since canned options may include syrup.

→ How can I make the filling especially creamy?

Blend cooled, cooked sweet potatoes with condensed milk, butter, and eggs until silky and completely smooth.

→ Is this dessert suitable for advance prep?

Absolutely. Chill the bars well after baking and add the marshmallows just before serving for the best texture.

→ What’s the secret to perfectly toasted marshmallows?

Broil briefly and keep a close watch—marshmallows brown quickly, so remove the pan once golden and gooey.

→ How should leftovers be stored?

Keep bars in an airtight container in the fridge for up to five days. They hold their square shape best when chilled.

Sweet Potato Pie Bars Marshmallow

Creamy sweet potato filling meets buttery graham crust, finished with gooey toasted marshmallows for festive sharing.

Prep Time
40 minutes
Cooking Time
60 minutes
Complete Time
100 minutes
Published By: Evelyn

Recipe Category: Desserts

Skill Level: Moderately Challenging

Cuisine Type: Southern American

Total Portions: 16 Serves How Many (16 squares)

Dietary Preferences: Vegetarian-Friendly

Required Ingredients

→ Crust

01 200 g graham cracker crumbs
02 40 g white granulated sugar
03 85 g salted butter, melted

→ Filling

04 400 g sweet potatoes, peeled and cubed
05 320 g sweetened condensed milk
06 60 g salted butter, softened
07 2 large eggs
08 1 tsp grated orange zest
09 1 tsp ground cinnamon
10 1/4 tsp ground ginger
11 1/8 tsp ground cloves

→ Topping

12 120 g mini marshmallows

Step-by-Step Instructions

Step 01

Place cubed sweet potatoes in a large stockpot, cover with water, and bring to a boil. Simmer for 15–18 minutes until fork-tender, then drain and cool on a plate.

Step 02

Preheat the oven to 180°C. Line an 20 cm square baking pan with parchment paper, leaving an overhang for easy removal.

Step 03

Combine graham cracker crumbs, sugar, and melted butter in a medium bowl until evenly moistened. Firmly press mixture into the bottom of the prepared pan to create an even layer.

Step 04

Bake the crust for 15 minutes, or until set and fragrant. Remove from oven, and allow to cool slightly while preparing the filling.

Step 05

Scoop cooled sweet potato into a large bowl. Add condensed milk, softened butter, eggs, orange zest, cinnamon, ginger, and cloves. Use an electric mixer to blend until smooth and creamy with no lumps.

Step 06

Pour sweet potato mixture evenly over prebaked crust. Bake for 35–45 minutes, or until a skewer inserted in the center comes out clean and filling is set.

Step 07

Allow bars to cool to room temperature, then transfer to the refrigerator to chill for at least 4 hours until firm.

Step 08

Once chilled, sprinkle mini marshmallows evenly over the surface. Place under a broiler for 2–3 minutes until marshmallows are golden brown and just melted. Watch closely to avoid burning.

Step 09

Cut cooled bars into squares with a sharp serrated knife, wiping between cuts for clean edges. Serve chilled or at room temperature.

Handy Cooking Tips

  1. Press the crust firmly for a stable base and chill bars completely before slicing for neat portions.
  2. For gluten-free bars, substitute gluten-free graham crackers and double-check all ingredient labels.
  3. Bars can be prepared in advance and refrigerated for up to five days. Toast marshmallows just before serving for best texture.
  4. Sweet potato pie bars draw on Southern traditions and combine classic pie and casserole flavors in a convenient format.

Necessary Kitchen Tools

  • Large stockpot
  • 20 cm square baking pan
  • Parchment paper
  • Electric mixer
  • Oven
  • Broiler
  • Mixing bowls
  • Measuring cup
  • Serrated knife

Allergy Details

Always check ingredient packaging for potential allergens and consult a healthcare professional when in doubt.
  • Contains wheat (graham crackers), dairy (butter, condensed milk), and egg.
  • Marshmallows may contain gelatin and traces of allergens. Check labels for specific warnings.

Nutritional Information (Per Serving)

These nutrition details are for guidance and don’t replace professional advice.
  • Calories: 210
  • Fat: 7 grams
  • Carbohydrates: 33 grams
  • Proteins: 3 grams