25 saccharin tablets, a pinch of salt
Preheat the oven to 170°C (338°F).
Wash the blueberries thoroughly and drain them.
In a bowl, combine raw rice flour, cake flour, and baking powder, mixing well.
In another bowl, cream together the butter and sugar substitute.
Add the eggs one at a time, mixing well after each addition.
Gradually add the milk, making the batter smooth.
Sift in the flour mixture and mix evenly.
Gently fold in the blueberries.
Pour the batter into a pound cake mold and smooth the surface.
Bake at 170°C for 35-40 minutes.
Let it cool, then cut into appropriate slices.