Place walnuts on a mesh strainer, wash and rinse raw walnuts.
Spread walnuts in even layer on a baking tray. Bake in a preheated oven at 160°C (320°F) for 15 minutes or until golden brown. Set aside to cool.
Add walnut and rice flour to a food processor, process the walnut until they are fine and evenly grounded.
Add 200 g of water and 1 Tbsp oil, process walnut with high speed to a smooth paste.
Add the rest of the water to the paste, and blend until it is completely smooth, blending time is about 2 minutes depending on the power of your appliance.
Sieve the mixture with a fine strainer. Sieve again before pouring into a cooking pot.
Mix in salt, brown sugar and evaporated milk, stir constantly and bring the mixture to boil on medium heat. Off the heat right after boiling.
Walnut sweet soup is a great cream-based dessert to enjoy warm.
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Notes
This recipe yields 3 servings of dessert. The nutritional value for reference is for 1 serving of dessert.