Ingredients
Preparation
Step 2
Whisk together flour, cocoa, baking soda, and salt.
Step 3
Beat together butter and brown sugar with an electric mixer until pale and fluffy. Add eggs 1 at a time, beating well after each addition, then beat in vanilla.
Step 4
Add flour mixture and water alternately in batches, beginning and ending with flour and mixing just until combined.
Step 5
Pour batter into cake pan and bake in middle of oven until springy to the touch and a tester inserted in center comes out clean, 55 minutes to 1 hour. Cool in pan 1 hour. Invert onto a rack, then turn right side up and dust with confectioners sugar.
