Grease 8x11 pan well. Place blackberries and raspberries in the pan. Cut up 1/4 cup margarine and place over the blackberries and raspberries.
In a small bowl, combine the sweet rice flour, brown sugar, cinnamon, and salt. Stir. Then add softened, almost melted, 1 cup margarine into mixture. Mix well and be sure that butter is combined with dry ingredients. Pour or scoop mixture over berries. Cut up the 2 remaining tablespoons of margarine and place on top of crisp mixture.
Bake in preheated oven for 40-45 minutes or until crisp is slightly browned.
Notes
Substitutions
This recipe works both with butter (if you do not have a milk allergy) or with margarine. I have not tried this recipe with any other flours but should work fine with all purpose flour if not avoiding wheat.
Butter and Margarine: Butter is a dairy product made from cow’s milk. Margarine typically contains milk or soy, but there are milk-free and soy-free versions available.
Gluten: Gluten is a protein found in specific grains (wheat, spelt, kamut, barley, rye). Other grains are naturally gluten-free but may have cross-contact with gluten-containing grains. Look for certified gluten-free products if you need to avoid gluten. Find out more about wheat and gluten substitutions.