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Ever end up with leftover cooked rice and wish you could turn it into a real dessert—one that slices neatly instead of spooning out like a soft pudding? These baked rice pudding squares are my go-to when I want something cozy and vanilla-scented, but still easy to portion for lunches, potlucks, or a not-too-sweet treat with coffee.

The trick is treating rice pudding like a custard bar: eggs and milk set up in the oven, and then a full cool-down (plus a short chill) gives you clean, sturdy squares. I like using cooled rice so it doesn’t warm the custard mixture and start “cooking” the eggs before it goes in the oven. You’ll get golden edges, a gently spiced top, and a soft middle that still holds its shape when cut.

Why You’ll Love This Recipe

Uses simple pantry ingredients you probably already have.
A smart way to use up leftover cooked white rice.
Bakes in one dish—no stovetop stirring required.
Cuts into tidy squares after chilling (great for sharing and packing).
Vanilla and cinnamon keep it classic and kid-friendly.
The texture is creamy but sliceable, like a custard bar with rice.

Ingredients

3 cups cooked white rice, cooled (about 510 g)
2 cups milk (480 ml)
3 large eggs
1/2 cup granulated sugar (100 g)
2 teaspoons vanilla extract (10 ml)
1/2 teaspoon ground cinnamon (1 g)
Pinch of salt (about 1/8 teaspoon)
1 tablespoon butter, for greasing the dish (14 g)

Ingredient Notes

Cooked white rice: Any plain cooked long-grain or medium-grain white rice works. Day-old rice from the fridge is perfect because it’s drier and helps the squares set neatly.
Milk: Whole milk gives the richest result, but 2% works fine. I don’t recommend skim—it can taste a little thin here.
Eggs: These are what turn the mixture into a sliceable custard. For best texture, use large eggs and whisk them well so there are no streaks.
Vanilla extract: This is the main flavor, so use a decent one if you can.
Cinnamon: Just enough for warmth. If you prefer a pure vanilla flavor, you can reduce it to 1/4 teaspoon.
Salt: A small pinch makes the vanilla taste more “vanilla,” not salty.

Kitchen Tools Needed

8-inch (20 cm) square baking dish
Mixing bowl
Whisk
Rubber spatula or spoon
Measuring cups and spoons
Cooling rack (helpful)
Knife for slicing

Step-by-Step Instructions

Preheat and prep the pan.
Heat the oven to 350°F (180°C). Butter an 8-inch (20 cm) square baking dish, making sure to grease the corners well.
Make the custard base.
In a large bowl, whisk together the milk (480 ml), eggs, sugar (100 g), vanilla (10 ml), cinnamon, and salt until smooth and well combined.
Stir in the rice.
Add the cooled cooked rice (about 510 g) and stir until the grains are evenly coated and the mixture looks consistent. (If your rice is clumped, break it up with your spoon so you don’t get dense pockets.)
Bake.
Pour the mixture into the buttered dish and smooth the top. Bake for 40–45 minutes, or until the edges are lightly golden, the top looks set, and the center gives only a gentle jiggle when you nudge the pan.
If the center still looks wet or sloshy, give it another 5 minutes, checking again.
Cool completely, then chill.
Let the dish cool to room temperature (this usually takes about 60–90 minutes). Then cover and refrigerate for at least 1 hour to firm up for clean slicing.
Slice and serve.
Run a thin knife around the edges, then cut into squares. For the cleanest cuts, wipe the knife between slices.

Pro Tips

Start with cooled rice. Warm rice can thin the custard and make the texture less even.
Don’t rush the chill. The hour in the fridge is what turns “spoon dessert” into tidy squares.
Watch the center, not just the timer. Ovens vary—look for set edges and only a slight wobble in the middle.
For extra-clean cuts, chill longer. If you have time, 2–3 hours (or overnight) slices even better.
Break up rice clumps before baking. It’s the difference between uniform squares and lumpy ones.

Common Mistakes

Cutting while warm: It will crumble and look messy. Cooling and chilling are non-negotiable here.
Underbaking the center: If it’s too loose, it won’t hold squares. Bake until the custard is set.
Using very wet, freshly cooked rice: Excess moisture can make the bars softer and harder to slice.
Skipping the butter on the dish: The edges can stick badly without it.

Variations

Raisin-cinnamon: Stir in 1/3 cup (50 g) raisins and bump cinnamon to 3/4 teaspoon.
Citrus-vanilla: Add 1 teaspoon finely grated orange or lemon zest to the custard mixture.
Coconut: Swap 1/2 cup (120 ml) of the milk for coconut milk and sprinkle unsweetened coconut on top.
Nut topping: Add a handful of sliced almonds or chopped pecans over the top during the last 10 minutes of baking.

Serving Suggestions

Serve chilled or at cool room temperature with a light dusting of cinnamon.
Add a spoonful of whipped cream or Greek yogurt on the side.
A drizzle of honey or maple syrup is lovely if you want it sweeter.
For a simple dessert plate, pair with fresh berries or sliced peaches.

Storage Instructions

Store covered in the refrigerator for up to 4 days.
Keep the squares in a single layer or place parchment between layers to prevent sticking.

Reheating Tips

These are best chilled or cool, since that’s when they slice and hold their shape. If you prefer them warm, reheat individual squares gently in the microwave for 10–20 seconds—just enough to take off the chill without turning the custard runny.

Nutrition Estimate

Approximate per serving (based on 9 squares):

Calories: 170
Protein: 6 g
Carbs: 28 g
Fat: 4 g

Recipe Summary

Prep Time: 10 minutes
Cook Time: 40–45 minutes
Total Time: 2 hours (includes cooling + chilling)
Servings: 9 squares
Cuisine: American
Course: Dessert
Calories: 170 per serving (estimate)

Frequently Asked Questions

Can I use leftover takeout rice?

Yes—plain, unseasoned cooked white rice works great. If it’s salted, it’s still fine; just keep the added salt in the recipe to a small pinch.

Why do I have to chill before cutting?

Chilling firms the custard. When it’s warm, the center is delicate and will smear; cold, it sets up so you get clean edges.

How do I know when it’s done baking?

Look for golden edges and a set top. The center should jiggle slightly like set custard, not ripple like liquid.

Can I make this with brown rice?

You can, but expect a chewier texture and slightly less “custardy” feel. Use well-cooked, cooled brown rice.

Can I freeze rice pudding squares?

You can, though the texture can turn a little more watery after thawing. If you freeze them, wrap tightly and thaw overnight in the fridge, then blot any moisture on top before serving.

Conclusion

If you love rice pudding but want something you can actually slice and share, these vanilla rice pudding squares are the answer. They’re simple, comforting, and a great way to turn leftover rice into a dessert that feels intentional. Let them cool and chill properly, and you’ll be rewarded with neat little squares that taste like classic rice pudding—just easier to serve.