This recipe comes from the 2016 edition of The Old Farmer’s Almanac.
Preheat the oven to 350 degrees F and grease an 8x8-inch baking pan.
Put the first seven ingredients into a blender or food processor and blend until smooth.
Transfer to a bowl and stir in the chocolate chips and walnuts. Pour into the prepared pan.
Bake for 35 minutes, or until a toothpick inserted into the center comes out clean.