Small Batch Texas Brownies

Ingredients

• 1/2 cup plus 1 tablespoon all-purpose flour
• 1/4 cup granulated sugar
• 1/4 cup brown sugar
• 1/4 teaspoon salt
• 4 tablespoons butter
• 2 1/2 tablespoons unsweetened cocoa powder
• 1/4 cup hot water or hot strong coffee
• 2 tablespoons milk
• 1 large egg
• 1/4 teaspoon baking soda
• 1 teaspoon vanilla extract
• 2 tablespoons unsweetened cocoa powder
• 3 tablespoons milk
• 1/2 teaspoon vanilla extract
• 1 ½ cups powdered sugar
• Pinch sea salt