Up next in Cooking Equipment (19 videos)
Master some new cooking skills and techniques with the tips in this Howcast video series about cooking equipment.
You Will Need
- A large pizza box
- A ruler
- A black marker
- A box cutter or utility knife
- Heavy-duty aluminum foil
- All-purpose glue
- Clear plastic wrap
- Black construction paper
- A stick or a hard-plastic straw
- A laser pointer
Draw a square
Using the ruler and black marker, draw a square on your pizza-box lid, leaving a 1-inch border from the edge of the box to each side of the square.
Form the flap
With the box cutter or utility knife, cut through three sides of the square you just drew, leaving the line at the rear of the box attached. Fold the flap back so that it stands up when the pizza-box lid is closed.
Cover the flap with foil
Cover the underside of the flap with heavy-duty aluminum foil, which will reflect sunlight into the oven. Glue the foil to the flap, smooth out wrinkles, and cut off any excess.
Tape plastic sheet
With the scissors, cut two square pieces of clear plastic wrap, each 1 square inch larger than the flap opening. Open the pizza box, and tape one piece of plastic to the underside of the hole so that the plastic covers it.
Tape second plastic sheet
Close the lid, and tape the second plastic sheet over the top of the hole, creating a window that helps keep the sun’s heat in the box. Pull both sheets taut as you tape them.
Layer the bottom with foil
Glue or tape a layer of aluminum foil to the inside bottom of your pizza box for insulation.
Cover with black paper
Cover the foil layer in the box with sheets of black construction paper and glue them into place. The black base will absorb light and generate more heat inside your oven.
Find best angle
Close the lid, and you’re ready to start cooking! On a bright day, place your solar oven outside in direct sunlight. Adjust the foil flap to find the best ray-reflecting angle, and use the ruler, a stick, or a hard-plastic straw to keep the flap propped in place.
Preheat your oven by leaving it in direct sunlight for 30 minutes. The box’s temperature will reach about 200 degrees, so while you won’t be able to cook a roast, you can reheat cooked food, melt cheese or chocolate, or—if you have all day—prepare a veggie stew.
Whatever you decide to cook, place it—on its own, or in a heat-safe container—in the center of the oven, so that it is directly under the plastic-wrap window. Close the lid, leaving the flap propped open, and check on your food every 15 to 30 minutes.