Here are a couple of excellent portable cooking solutions if there is no electricity or natural gas available. The collapsible small sizes make make them a no-brainer as to whether or not you are going to include a cooking stove in your bug-out supplies.
This lin
k takes you to the most thorough Solar Cooker site you are going to find. In that they require no other fuel, Solar Cookers can be a nice portable solution. The advantage to solar cookers is you only need the sun to make them work. The disadvantage to solar cookers is you need the sun to make them work. This means they are dependent upon your geographic location, the time of year, and the time of day.
There are other very nifty compact survival cookers that use small pieces of wood or bio-mass (any plant materials or animal waste that burns) for fuel. Most of these are highly efficient, using only a minimum of fuel to produce a high heat with minimal heat loss.
This very popular model can also support three different fuel types: wood, charcoal, or propane.
The key feature with these survival stoves is they are designed to be very portable. For example, fully extended, they are typically only about five inches tall and about that wide. They are generally collapsible down to a compact size that fits into a small carrying case. Yet they are versatile enough to cook for a number of people at once.
This compact, but durable, model can be broken down into six small pieces to fit into its carrying case. It’s a less expensive model than the others.