To email a cake decorating company, first locate their contact information which is usually available on their website or social media accounts. Once you have obtained the email address of the company, open your preferred email client or webmail service like Gmail or Outlook. Compose a new email and in the recipient field, enter the appropriate email address of the cake decorating company. Write a clear subject line that explains the purpose of your message concisely. In the body of your email, introduce yourself if necessary and clearly explain any specific inquiries or requests you may have regarding their products or services. It's always best to be polite and concise when drafting your email while ensuring you include all necessary details to help them understand what you're looking for. Finally, proofread your message before sending it to make sure there are no errors or missing information that could potentially confuse the recipient.