Preheat oven to 350°F (175°C). Line a loaf pan with parchment.
Whisk almond flour, eggs, melted butter, sugar substitute, and baking powder into a soft dough.
Beat cream cheese with 1 tbsp sugar substitute until smooth.
Mix melted chocolate with remaining sugar substitute.
Roll the dough between two sheets of parchment into a large rectangle.
Spread the cream cheese layer evenly over the dough, then the chocolate layer on top.
Roll the dough up tightly from one long side into a log, then twist it in half lengthwise, keeping the cut sides facing up.
Transfer to the prepared pan, twisted side up.
Bake 30–35 minutes, until set and lightly browned.
Cool completely before slicing.