In a microwave-safe mug, whisk together the flour, sifted cocoa powder, brown sugar, salt, and baking powder. Make sure there are no lumps in the cocoa powder before mixing—I always sift mine to ensure a smooth, lump-free brownie texture. Stir these dry ingredients together until well combined and evenly distributed throughout the mug.

Add the milk, neutral oil, and vanilla to the mug with the dry ingredient mixture. Stir vigorously until you have a smooth, uniform batter with no dry pockets or streaks. The batter should be thick but pourable—this creates the ideal fudgy brownie texture when microwaved.

Fold the chocolate chips into the batter from Step 2, reserving a few to sprinkle on top for visual appeal and extra chocolate bursts. Microwave the mug on high for 60 seconds—the brownie will rise slightly and the center should look set but still have a slight jiggle. If it still looks raw in the center after 60 seconds, continue microwaving in 5-second intervals until just barely set. I find that semi-sweet chips add a nice richness without being too intense.

Let the brownie cool in the mug for 3-4 minutes—this allows it to set slightly while the interior remains warm and fudgy. Top with a scoop of vanilla ice cream, a dollop of whipped cream, and drizzles of chocolate and caramel sauce. The temperature contrast between the warm brownie and cold ice cream is what makes this dessert truly special, so serve immediately.