25 saccharin tablets, a pinch of salt
Preheat the oven to 170°C (338°F).
Add butter and peanut butter to a bowl and mix until smooth.
Add stevia and cream together.
Add eggs one at a time, mixing after each addition.
Sift cake flour, baking powder, and salt into the bowl.
Mix the batter thoroughly.
Line a pound cake pan with parchment paper and pour in the batter.
Bake in the preheated oven for 30–35 minutes.
Cool and cut into a single slice.