Step 1: Preheat your oven to 350°F (175°C) to ensure even baking.
Step 2: Line a 9x9 inch baking pan with parchment paper, leaving some overhang.
Step 3: In a medium saucepan over low heat, melt the dark chocolate and coconut oil. Stir until smooth, then remove from heat and let cool slightly.
Step 4: In a large mixing bowl, whisk together the allulose, eggs, and vanilla extract. Add the cooled chocolate mixture and mix until combined.
Step 5: In another bowl, whisk together the almond flour, cocoa powder, and salt.
Step 6: Gradually add the dry mixture to the wet mixture, folding gently to combine.
Step 7: Fold in the dark chocolate chips or other add-ins.
Step 8: Pour the batter into the prepared pan and bake for 25-30 minutes, until a toothpick comes out with moist crumbs.
Step 9: Let the brownies cool in the pan for 10 minutes, then lift out using the parchment paper and cool completely on a wire rack before cutting.