Step 1

Preheat oven to 350°F (180°C).

Step 2

Grease a 9-inch (23 cm) cake pan with butter.

Step 3

In a medium bowl, mix the butter, sugar, and brown sugar until fluffy.

Step 4

Add the eggs one at a time, then add the vanilla. Whisk until combined.

Step 5

Fold in the flour, salt, cinnamon, and baking powder until combined.

Step 6

Fold in the berries.

Step 7

Transfer to a baking pan.

Step 8

Bake for 40 minutes, or until golden brown.

Step 9

Cool for 30 minutes before serving.

Step 10

Slice and sprinkle with powdered sugar.

Step 11

Enjoy!