Preheat the oven to 325 degrees Fahrenheit (160 degrees Celsius).

Spray a 9x5-inch loaf pan with nonstick cooking spray.

In a large bowl, cream together the butter and sugar until light and fluffy.

Beat in the eggs one at a time, mixing well after each addition.

Add the finely ground almonds, almond extract, and cinnamon and mix until combined.

Gradually blend in the flour and baking powder.

Sprinkle the coarsely chopped almonds into the prepared loaf pan.

Spoon the batter evenly over the almonds in the pan.

Bake for 55-60 minutes, or until a wooden toothpick inserted into the center comes out clean.

Let the loaf cool in the pan for 10 minutes before transferring it to a wire rack to cool completely.