Wait, what? Mix thoroughly? No. Stir until blended? No. It said 50 strokes with a spoon. I tried just stirring it 50 times and there were still clumps. The brownies turned out fine, and I think a wooden kitchen spoon is a terrific spanking implement that doesn't get enough credit, but I thought this was highly amusing.
I know, pics or it didn't happen... so here you go- a pic of the back of the box with the instructions.