Cream the butter and sugar together.
Add eggs one at a time, mixing well after each addition.
Sift cake flour, baking powder, and salt, then add to the mixture and mix evenly.
Add almond flour and milk, mixing gently until smooth.
Gently fold in blueberries with a spatula.
Pour the batter into a pound cake mold and smooth the top.
Bake in a preheated oven at 180°C (356°F) for 40 to 45 minutes.
Remove onto a cooling rack and let cool.