Small batch brownies. One dirty bowl, one 8x4" loaf pan of brownies, ready in 30 minutes.

Ingredients Step
Preheat the oven to 350 degrees. Line an 8x4" loaf pan with a parchment sling, creasing the top edges so they hang outside the pan (and are less likely to fall in in the oven). Lightly grease the parchment and pan.
5 T. butter Microwave to melt, using a large bowl.
150 g. (¾ c.) sugar Whisk in.
1 egg
1 t. vanilla
Whisk in, until shiny and emulsified.
32 g. (6 T.) cocoa powder Whisk in, until well combined.
45 g. (6 T.) flour
¼ t. salt
1/16 t. (pinch) baking powder
Whisk in, until just combined.
57 g. (⅓ c.) chocolate chips Stir in.
Transfer batter to the prepared pan. Spread it flat and evenly to the edges.
Bake ~30 minutes, until a toothpick comes out clean (205 degrees).
Let cool completely in the pan. Then lift them out using the parchment sling to cut them.

Source: David Turner (KAF)