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Export 8 ingredients for grocery delivery
Step 1
Position rack in center of oven and preheat to 325 degrees.
Step 2
Brush the inside of an 8-inch square cake pan with oil and sprinkle flour over the pan. Tap out excess.
Step 3
Sift together flour, sugar, cocoa, baking soda and salt in a large mixing bowl.
Step 4
In a small bowl, whisk together egg, oil and vanilla. Stir lemon juice into milk. Add to the egg mixture. Stir in 1/2 cup hot water. Pour into the cocoa mixture and stir until smooth. Turn batter into pan. Bake for 30 to 35 minutes, or until a toothpick inserted in the center comes out clean.