In a microwave-safe mug, whisk together flour, sugar, cocoa powder, baking soda, and salt.
Add milk, canola oil, water, and vanilla extract, then mix until smooth.
Ensure there are no dry lumps; scrape the bottom of the mug for even mixing.
Microwave on high for 60–90 seconds until the cake rises and is set in the center.
Let it cool for a minute before digging in.
Enjoy as is, or top with chocolate chips, whipped cream, or ice cream for extra indulgence.
Serve warm with your favorite Iced Sugar Cookie Almond Milk Latte for the perfect treat.