For the best swirl and texture, make sure the cream cheese and eggs are truly at room temperature so the mixtures combine smoothly without lumps. If your sweetener is very coarse, you can briefly pulse it in a blender to create a finer texture that dissolves more easily. Adjust sweetness to taste by adding an extra tablespoon or two of erythritol if you prefer a sweeter brownie, keeping in mind that very dark cocoa can make the batter taste more bitter before baking. Avoid overbaking, as almond flour brownies firm up more as they cool and you want the center to stay fudgy rather than cakey. To cleanly slice the chilled brownies, wipe the knife with a warm, damp cloth between cuts. For a gourmet finish that is still keto friendly, top each serving with a dollop of unsweetened whipped cream and a light sprinkle of flaky sea salt or a few raspberries, making sure any fruit fits within your macros.