Each cake needs to be baked on both sides for 3 minutes.

Then it takes 6×3= 18 minutes to bake three cakes.

Option 2: Brand 2 first, then brand 3.

Grasp the rules in the topic, and bake at most two cakes at a time.

The first three minutes are imprinted on the front of the first and second pictures;

The last three minutes were branded with the reverse sides of the first and second chapters;

Bake for another 3 minutes with the sides of the third cake.

The total time of this scheme is 6×2= 12 minutes.

Option 3: brand two faces first, then brand the reverse side of one face and the front side of the third face, and finally brand the remaining two faces.

Brand the first and second fronts in the first 3 minutes;

The second 3 minutes branded the first anti-third front;

The third 3 minutes branded the second reversal and the third reversal.

The time used in this scheme is: 3×3=9 minutes.

Of course, the third scheme is better, takes less time and can eat the cake faster. Bake two cakes in the pot at a time. Don't leave the pot idle. This will save the most time.