Been looking for this recipe for ages. No DCC Chocolate Bar, No Butter! Easy fudgy shiny crust brown

This is a recipe I've been looking for for a long time. It's simple, practical, inexpensive, and requires few ingredients. It doesn't require chocolate bars (DCC) or butter, but the results are quite delicious, especially after it's been refrigerated, making it even more delicious 😋.

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Fudgy Brownies/Fudge Without Chocolate and Butter.
Source: @indynaiwang8023
Rebaked, modified measurements: @VinastarChannel

65 grams unsweetened cocoa powder (use the best cocoa powder for a delicious taste)
150 grams vegetable oil/cooking oil (room temperature).
3 medium eggs and enough warm water for soaking.
300 grams sugar (adjust to taste; if you reduce the amount of sugar, you might not get a shiny crust. In my opinion, this is perfect because it uses full bittersweet cocoa powder without DCC, so the sweetness and bitterness are balanced).
85 grams all-purpose flour.
Additional ingredients:
3/4 teaspoon salt.
1 teaspoon vanilla.

*Important
The more the sugar dissolves, the easier it will be to achieve a shiny crust (you don't have to use a mixer, just beat until the sugar dissolves and the granules become small. You can also beat it manually, pausing occasionally to allow the sugar to dissolve, but it might take longer. Alternatively, you can use granulated sugar blended in a blender.
*Remove the brownies from the pan when they're cool to ensure they're firmer, as they'll be soft and prone to falling apart when hot.
*Store in the refrigerator in an airtight container; the longer they sit, the better they'll be. 👍