This is one of the most versatile sauces to have in your repertoire of recipes. I've tried it with a variety of gluten-free flours with mixed results. So far my favourite is using Mochiko sweet rice flour also known as sticky glutinous rice flour. Don't let the words "sweet" or "glutinous" confuse you - this flour is neither sweet nor does it have gluten in it.
Sweet rice flour is made from short grain rice. It has a high starch content compared to regular rice flour which is made from long (regular) grain rice. While regular rice flour has a grainy and gritty texture, sweet rice flour is smooth. Sweet rice flour is great for thickening sauces and it also freezes and thaws well.
You can add 1/2 cup of shredded cheese to make a good cheese sauce. If you would like different flavoured sauces experiment with adding other seasonings such as curry powder or herbs.
If you'd like more information about Koda Farms Mochiko Sweet Rice Flour here is a link to their website. The recipe below is from the Koda Farms sweet rice flour box. I sometimes adjust the thickness of the sauce by adding about 1/2 a tablespoon more of sweet rice flour.
Both ways of making bechamel or white sauce are good, but I prefer using the Mochiko Sweet Rice flour as it gives a nice smooth texture and is closest to the taste of regular flour.
How do you make your white sauce?