Preheat oven to 325 degrees F. Line inside of two mini loaf pans (3x5 or 3x6) with parchment paper or foil. Grease foil.
In a nonstick saucepan, melt the butter gently. Add the oil and allulose and cook over low heat, tilting to dissolve the allulose. With a rubber scraper, stir in the cocoa powder. Remove from heat and let cool slightly.
Whisk in the egg until smooth, then whisk in the vanilla.
Mix together almond flour, baking powder and salt and stir into the batter.
Pour mixture into the prepared loaf pans, dividing evenly. Sprinkle chocolate chips on top or stir them into the batter if you'd like them buried in the brownies.
Bake at 325 for about18 minutes or until they appear just barely set.
Let cool before slicing. If you have time, you can cool, chill and cut while cold.