Mango sticky rice krispies are a no-bake mash-up of chewy, coconut-scented Thai-style sticky rice, crisp rice cereal, and fresh mango. A little coconut sauce brings the familiar sweet-salty flavor of mango sticky rice to a soft, sliceable treat, while mango added just before serving keeps its fruity freshness.
Ingredients
- 1 cup (200 g) uncooked Thai sweet rice, also called glutinous rice
- 1 cup (240 ml) water, for cooking the rice
- 1 can (13.5 oz / 400 ml) full-fat coconut milk, well shaken and divided
- ½ cup (100 g) granulated sugar, divided
- ½ teaspoon fine salt, divided
- 1 tablespoon (15 ml) water, for the coconut topping
- 4 cups (112 g) crisp rice cereal
- 3 tablespoons (42 g) unsalted butter
- 1 bag (10 oz / 283 g) mini marshmallows, about 5½ cups
- 1 teaspoon vanilla extract
- 2 ripe but firm mangoes, about 2 cups (300 g) diced, for serving
- 1 tablespoon (8 g) toasted sesame seeds or finely sliced scallions, optional garnish
Instructions
- Soak the rice. Rinse the sweet rice in a fine-mesh strainer until the water runs mostly clear. Put it in a bowl, cover with at least 2 inches (5 cm) of cool water, and soak for 1 hour. Drain thoroughly. This soak helps the grains cook evenly; do not substitute ordinary long-grain rice, which will not have the same sticky texture.
- Cook the rice. Put the drained rice and 1 cup (240 ml) water in a small, heavy saucepan. Bring to a boil, cover, and turn the heat to very low. Cook for 15 minutes, then turn off the heat and leave covered for 10 minutes. Check that the grains are tender and the water has been absorbed; if they are still firm, add 1 tablespoon (15 ml) water and cook covered for 3–5 more minutes.
- Make the coconut sauce. While the rice cooks, whisk ¾ cup (180 ml) coconut milk with ¼ cup (50 g) sugar and ¼ teaspoon salt in a small saucepan. Warm over low heat for 3–4 minutes, stirring until the sugar dissolves; do not boil. Pour the warm sauce over the cooked rice and fold gently. Cover and rest for 15 minutes so the rice absorbs the coconut milk. Set aside the remaining coconut milk for the topping.
- Prepare the pan and cereal. Lightly butter a 9-inch (23 cm) square pan or line it with parchment, leaving an overhang to lift out the treats. Place the cereal in a large heatproof bowl. If the rice mixture has excess liquid, fold it gently over low heat for a minute or two until thick and spoonable; it should be sticky, not soupy.
- Melt the marshmallow mixture. In a large saucepan, melt the butter over low heat. Add the marshmallows and stir frequently until just melted and smooth, about 4–6 minutes. Remove from the heat, then stir in the vanilla and the coconut-rice mixture. Fold in the cereal until evenly coated. Work gently and promptly so the cereal retains some crunch.
- Press and chill. Transfer the mixture to the prepared pan. With lightly buttered hands or a buttered spatula, press it into an even layer without packing it down firmly; a light touch makes softer treats. Let cool for 20 minutes, then refrigerate for 45 minutes to set enough for clean slices.
- Finish the topping and serve. Stir the remaining ¼ cup (60 ml) coconut milk with ¼ cup (50 g) sugar, ¼ teaspoon salt, and 1 tablespoon (15 ml) water in a small pan. Warm gently until smooth, about 2 minutes, then cool for 5 minutes. Lift out and cut the slab into 12 squares. Spoon a little coconut topping onto each square, add diced mango, and sprinkle with sesame seeds or scallions if desired. Serve immediately.
Tips
- Look for Thai sweet rice or glutinous rice in Asian grocery stores or the international aisle. Despite the name, it contains no gluten. If unavailable, use cooked short-grain sushi rice; it is less chewy and may make the bars softer.
- Use firm-ripe mangoes that hold their shape when diced. Very soft fruit releases juice and can make the cereal treats soggy, so add mango only when serving.
- Keep the heat low when melting marshmallows and avoid pressing the mixture hard into the pan. High heat or heavy packing can make the bars tough.
- For easier cutting, grease the knife lightly and wipe it between slices. If the slab is too firm straight from the refrigerator, let it stand at room temperature for about 10 minutes.
Serving Suggestions
Serve the squares as a playful dessert after a Thai-inspired meal or as a sweet snack with unsweetened tea. For a more direct take on mango sticky rice, place a slice on a plate, spoon the coconut topping around it, and add fresh mango on the side rather than piling fruit onto the bar. A pinch of flaky salt can balance the sweetness.
Variations
For a dairy-free version, replace the butter with a neutral plant-based butter; check the marshmallow label if avoiding animal gelatin. Add 1 tablespoon (9 g) toasted sesame seeds or 2 tablespoons (14 g) toasted coconut to the cereal for extra texture. A small pinch of ground cardamom in the coconut sauce gives a fragrant twist, though it is not traditional. You can also leave the mango off the bars and serve it separately, which is the best option if making them ahead.
Storage and Reheating
Because these treats contain cooked rice and coconut milk, refrigerate them within 2 hours of making them. Store the plain, sliced bars in an airtight container with parchment between layers for up to 3 days; keep the coconut topping in a separate covered container and use within 3 days. Cut mango is best kept refrigerated and used within 1–2 days. Add topping and fruit just before serving.
These bars are best at room temperature and do not need reheating. Let refrigerated bars sit out for 10–15 minutes to soften before eating. Freezing is possible for the plain bars: wrap individually and freeze for up to 1 month, then thaw in the refrigerator overnight. Do not freeze them with fresh mango or coconut topping, which can become watery.
Frequently Asked Questions
Can I make mango sticky rice krispies without soaking the rice?
Soaking is strongly recommended because it helps Thai sweet rice cook evenly. If you skip it, the grains may remain firm in the center. For a shorter route, use about 2 cups (320 g) freshly cooked sticky rice, measured after cooking, and continue with the coconut sauce step.
Can I use canned mango?
Fresh mango gives the best texture, but well-drained canned mango can work as a topping. Pat it dry and add it at serving time. Avoid mixing any mango into the cereal base because extra moisture softens the treats.
Why are my bars hard or crumbly?
Hard bars usually come from overheating the marshmallows or pressing the mixture too firmly. Crumbly bars may mean the cereal was not coated evenly, or the rice mixture was too dry. Stir thoroughly, work while the marshmallow mixture is warm, and press only enough to form an even layer.
Can I make them a day ahead?
Yes. Make and chill the plain bars, then cover and refrigerate them. Prepare the coconut topping separately and cut the mango shortly before serving. The cereal softens over time, so these are best within 1–2 days.
Is glutinous rice gluten-free?
Yes. “Glutinous” describes the rice’s sticky texture, not gluten content. If gluten avoidance is important, check the cereal and marshmallow labels for cross-contact or added ingredients.
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