1-First, combine the sugar, cocoa powder, salt, and cornstarch in a saucepan. Make sure everything is well mixed to avoid lumps later.

2-Next, whisk in the cold milk until the mixture is smooth and even. This step ensures a creamy texture from the start.

3-Heat the mixture over medium heat, stirring constantly until it comes to a boil and thickens. Keep an eye on it to prevent burning.

4-Once it thickens, immediately remove from heat and stir in the butter and vanilla. This adds that extra touch of flavor and creaminess.

5-Allow the pudding to cool completely, stirring occasionally to keep a skin from forming. For best results, place plastic wrap right on the pudding’s surface while it cools.

6-Finally, serve it chilled or warm, depending on your preference. If you’re adapting for diets, use plant-based milk and stir carefully as times might vary slightly.