Mini Green Bean Casserole Cups
These mini green bean casserole cups turn a traditional Thanksgiving side dish into a fun, individually portioned recipe kids can pick up and enjoy.
Each cup combines crisp, flaky phyllo pastry with tender green beans, finely chopped mushrooms, a mild homemade cream sauce, and a crunchy fried-onion topping. They have all the familiar flavors of green bean casserole in a smaller, more approachable serving.
These mini green bean casserole cups are one of our recipes from our 12 Kid-Friendly Thanksgiving Food Ideas collection.
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A Kid-Friendly Thanksgiving Side Dish
Traditional green bean casserole can be difficult for little hands to serve and sometimes looks less inviting once it reaches a child’s plate. Baking it inside individual phyllo shells gives the familiar casserole a playful presentation while keeping every serving tidy.
The crisp pastry also provides a nice contrast to the creamy filling. Because the green beans are cut into short pieces and the mushrooms are chopped fairly small, the cups are easier for children to bite and enjoy.
Serve them as:
A kid-friendly Thanksgiving side dish
A handheld holiday appetizer
Part of a children’s Thanksgiving table
A fall party food
A creative way to introduce green bean casserole
Ingredients
For the Phyllo Cups
4–6 sheets phyllo dough, thawed according to the package directions
4 tablespoons unsalted butter, melted
You will need approximately 36 phyllo squares measuring about 4 inches each.
For the Green Bean Filling
12 ounces fresh green beans, trimmed and cut into ¾- to 1-inch pieces
8 ounces cremini or white mushrooms, finely chopped
2 tablespoons unsalted butter
2 tablespoons all-purpose flour
1 cup whole milk
½ cup low-sodium chicken or vegetable broth
½ teaspoon garlic powder
¼ teaspoon onion powder
½ teaspoon salt, or to taste
⅛ teaspoon black pepper, optional
1 cup crispy fried onions, divided
Supplies (affiliate links):
These are made in a standard muffin pan rather than a miniature muffin pan. The finished cups should measure approximately 2½–3 inches across.
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How to Make Green Bean Casserole Cups
1. Prepare the Green Beans
Preheat the oven to 375°F.
Bring a medium saucepan of water to a boil. Add the chopped green beans and cook for approximately 3–4 minutes, just until they become bright green and slightly tender.
Drain the beans and immediately rinse them under cold water to stop the cooking process. Pat them dry and set them aside.
2. Cook the Mushrooms
Melt 2 tablespoons of butter in a skillet over medium heat. Add the finely chopped mushrooms and cook for approximately 5–6 minutes, stirring occasionally, until their liquid has evaporated and the mushrooms are tender.
Chopping the mushrooms fairly small helps them blend into the creamy filling and makes the cups more approachable for children.
3. Make the Cream Sauce
Sprinkle the flour over the cooked mushrooms and stir continuously for about one minute.
Slowly pour in the milk and broth while whisking. Add the garlic powder, onion powder, salt, and optional black pepper.
Continue cooking for approximately 3–5 minutes, stirring frequently, until the sauce is thick and creamy. It should coat the back of a spoon and hold its shape rather than appearing runny.
Remove the skillet from the heat and fold in the green beans. Allow the filling to cool slightly while you prepare the pastry.
4. Form the Phyllo Shells
Keep the unused phyllo covered with a slightly damp kitchen towel so it does not dry out while you work.
Cut the phyllo into approximately 4-inch squares. Brush one square lightly with melted butter, place another square over it at a slight angle, and brush again. Add a third square at another angle.
Gently press the layered stack into one muffin well, allowing the corners to form a ruffled edge. Repeat until all 12 muffin wells contain three layers of phyllo.
Avoid using too much butter. A light coating is enough to help the layers become golden and crisp.
5. Prebake the Shells
Bake the empty phyllo shells for approximately 7–8 minutes, or until they are lightly golden and beginning to crisp.
Remove the pan from the oven, but leave the shells inside the muffin wells.
6. Fill the Cups
Spoon the green bean-and-mushroom mixture evenly into the prebaked shells. Fill each cup just below the top of the pastry.
Bake for approximately 7–8 minutes, until the filling is heated through and the pastry edges are golden.
7. Add the Crispy Onions
Remove the pan from the oven and add a small mound of crispy fried onions to each cup.
Return the pan to the oven for another 3–4 minutes. Watch the onions closely because they can brown quickly.
8. Cool and Serve
Allow the casserole cups to cool in the pan for approximately five minutes. Carefully loosen the edges with a small offset spatula or butter knife, then lift the cups from the muffin pan.
Serve them warm while the phyllo shells and onion topping are crisp.
Tips for the Best Casserole Cups
Keep the Phyllo Covered
Phyllo dough dries out quickly. Keep the unused sheets covered with plastic wrap and a lightly dampened kitchen towel while assembling the cups.
Use Three Pastry Layers
Three offset phyllo squares create a shell that is sturdy enough to hold the filling without becoming too thick or difficult to bite.
Dry the Green Beans
Excess water can thin the sauce and make the pastry soggy. Drain and dry the blanched green beans before folding them into the filling.
Keep the Sauce Thick
The filling should be thicker than a traditional casserole because it needs to stay inside the individual shells. Let the sauce cook until it clearly coats the spoon.
Add the Onions Near the End
Adding the fried onions during the final few minutes helps them stay crisp and prevents them from burning.
Kid-Friendly Adjustments
For a milder flavor, use white mushrooms and omit the black pepper. Chop the mushrooms finely so they blend into the sauce instead of forming large pieces.
If your child is hesitant about mushrooms, reduce the amount to four ounces. The sauce will still have a classic casserole flavor without being mushroom-heavy.
You can also leave a few cups lightly topped for children who do not like a large amount of crispy onion.
Make-Ahead Instructions
Prepare the green bean-and-mushroom filling up to one day in advance. Store it in a covered container in the refrigerator.
The phyllo shells can be formed and prebaked several hours before serving. After they have cooled completely, keep them loosely covered at room temperature.
For the crispest results, fill and finish baking the cups shortly before serving.
Do not refrigerate the empty baked shells, because moisture from the refrigerator can soften the pastry.
Storage and Reheating
Store leftover casserole cups in an airtight container in the refrigerator for up to three days.
Reheat them on a baking sheet at 350°F for approximately 8–10 minutes. The oven will restore more of the pastry’s crisp texture than the microwave.
The cups can be microwaved, but the phyllo and onion topping will become softer.
Frequently Asked Questions
Can I use frozen green beans?
Yes. Thaw them completely, cut them into short pieces, and pat them thoroughly dry. You generally do not need to blanch frozen green beans before adding them to the filling.
Can I use canned green beans?
Canned green beans can be used, but the finished filling will be softer. Drain and dry them well before adding them to the sauce.
Can I use condensed cream-of-mushroom soup?
Yes. For a shortcut version, replace the homemade mushroom sauce with approximately one 10.5-ounce can of condensed cream-of-mushroom soup mixed with ⅓ cup milk. Add it gradually so the filling does not become too runny.
Is a standard or mini muffin pan better?
Use a standard 12-cup muffin pan. A mini muffin pan produces shells that are too small to hold enough green bean filling and makes the phyllo more difficult to layer.
Can I use premade phyllo shells?
Premade miniature phyllo shells work for appetizer-sized bites, but they will be much smaller than the cups shown here. Reduce the filling amount in each shell and shorten the baking time.
How do I keep the bottoms from becoming soggy?
Prebake the empty shells, use a thick filling, and avoid assembling them too far in advance. Make sure the cooked green beans and mushrooms do not contain excess moisture.
Mini Green Bean Casserole Cups Recipe
Prep time: 30 minutes
Cook time: 25 minutes
Total time: Approximately 55 minutes
Yield: 12 casserole cups
Ingredients
Phyllo Shells
4–6 sheets phyllo dough, enough for 36 four-inch squares
4 tablespoons unsalted butter, melted
Green Bean Filling
12 ounces fresh green beans, trimmed and cut into ¾- to 1-inch pieces
8 ounces cremini or white mushrooms, finely chopped
2 tablespoons unsalted butter
2 tablespoons all-purpose flour
1 cup whole milk
½ cup low-sodium chicken or vegetable broth
½ teaspoon garlic powder
¼ teaspoon onion powder
½ teaspoon salt
⅛ teaspoon black pepper, optional
1 cup crispy fried onions
Instructions
Preheat the oven to 375°F.
Boil the green beans for 3–4 minutes. Drain, rinse under cold water, and pat dry.
Melt 2 tablespoons of butter in a skillet. Cook the mushrooms for 5–6 minutes.
Stir in the flour and cook for one minute.
Gradually whisk in the milk and broth. Add the garlic powder, onion powder, salt, and optional pepper.
Cook for 3–5 minutes, stirring frequently, until the sauce is thick.
Fold in the green beans and remove the filling from the heat.
Cut the phyllo into approximately 4-inch squares.
Layer three lightly buttered squares at offset angles and press them into one well of a standard muffin pan. Repeat to create 12 shells.
Prebake the empty shells for 7–8 minutes.
Divide the filling evenly among the shells.
Bake for another 7–8 minutes.
Top each cup with crispy fried onions and bake for 3–4 additional minutes.
Cool in the pan for five minutes, carefully remove, and serve warm.
Save This Thanksgiving Recipe
These mini green bean casserole cups are an easy way to serve a familiar Thanksgiving side in a playful, kid-friendly format. Save this recipe for your holiday menu, Friendsgiving celebration, or children’s Thanksgiving table.
