Preheat oven to 350°F. Grease a 9 x 5-inch loaf pan and line with parchment paper.
In a large bowl, sift the flour, baking powder, salt and sugar together.
Add the peanut butter and eggs to the flour mixture and beat until combined. Beat in the milk.
Pour into prepared pan and bake for 45-50 minutes, until the top is golden brown and a toothpick inserted in the center comes out clean. Let cool completely in the pan before inverting onto a plate and slicing. Serve with jam or butter.
Notes
To make bread with all-purpose flour instead of almond flour, increase the milk to 1½ cups, increase the baking powder to 4 teaspoons and omit the eggs.
To add texture, top the bread with chopped peanuts or chocolate chips before baking.