Whisk the flour and baking powder together. Add the salt to the dry mix. Set this bowl aside for later. This ensures a very even rise.

Beat the soft butter and sugar now. Use your electric mixer for this. The mix should look very pale. This takes about three minutes total.

Add the cream cheese to the bowl. Beat it until the lumps go away. It should look very smooth and light. This adds the best creamy texture.

Mix in the eggs one by one. Add the vanilla extract at this time. Scrape the sides of the bowl often. This mixes everything very well.

Slowly add the dry flour mixture. Mix on a very low speed. Stop as soon as flour disappears. Do not overmix the batter now.

Toss your blueberries in a little flour. Gently fold them into the batter. Use a spatula for this part. This keeps the batter from turning blue.

Pour the batter into the loaf pan. Smooth the top with your spatula. Bake for sixty to seventy minutes. A toothpick should come out clean.