‘Black and Tan’ Snacking Cake

Ingredients

• 1½ cups all-purpose flour
• 1 cup sugar
• 3 Tbsp cocoa powder
• 1 tsp baking soda
• ½ tsp coarse salt
• 6 Tbsp vegetable or canola oil
• 1 tsp pure vanilla extract
• 1 Tbsp cider vinegar
• ½ cup cold water
• ½ cup stout (such as Guinness)
• ¼ cup butter, softened
• 1 ½ cups powdered sugar
• 2-3 Tbsp stout beer