This is from the book "Art Fun!" by Kim Solga
Mix 5 cups water, 2 cups white flour, 1/2 cup sugar, and 3 Tablespoons salt.
Pour into saucepan and cook over medium heat until thick and bubbling (about
minutes) Cool well. This can be stored in the refrigerator in covered
containers for several weeks. Spoon cooled "pudding" into containers and mix
with 1/8 to 1/4 cup powdered or liquid tempera paint.
Use a craft stick or palette knife to apply. Use heavy tagboard or
as it will curl.
> I know that I saved some info from the list recently about making tempera
> thick to use for painting. The purpose was to simulate the thick
> brushstrokes of van Gogh.