Please provide a detailed explanation of how to bake a classic chocolate cake. Your response should contain at least 5 sentences. The response must have 2 sections. Mark the beginning of each section with Section 1 and Section 2. Include keywords ingredients, mixing, baking, cooling, and frosting in the response. In your response, the word cake should appear at least 3 times. At the end of your response, please explicitly add a postscript starting with P.S.
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