Peanut Butter Cookies Baked in a Solar Pizza Box Oven

Today we made cookies in our solar oven.

I set the pizza box on an old stove we have in the back yard, because I was too lazy to bend over and I wanted to see if the heat from the metal would make a difference.

Here is the first batch of cookies ready to cook.

Into the oven they go.  The oven thermometer  (in the upper right corner) says 78 degrees.

Here they are after 40 minutes of cooking.  I think they are done. The temperature when I took them out was 158 degrees.

Turn the box so that the reflector (lid) is facing directly into the sun.  The shadow will follow the same angle as the box.  Rotate the box as needed.  I rotated it with every new batch of cookies.

This is the second batch of cookies cooking.  In the bottom right corner you can sort of see the oven thermometer.  The temperature stayed at 158 degrees.  The second batch cooked 50 minutes and the third batch cooked 60 minutes.  The third batch was the best and could have cooked even longer.

The 12 on the left are the third batch.  The 8 in the center are the second batch and the 4 on the right are the first batch.

The kids ate them even though they were not cooked enough.

The chocolate chip cookies I baked last year were in the box on the cement. The thermometer reached a temperature of 230 degrees, so on the cement the oven goes next time.