Why did my cookies turn out flat?
Many factors contribute to a flat cookie. The biggest one tends to be the temperature of the butter when the ingredients are mixed together. If you want a taller, more dense cookie, it is recommended you use cold butter. The best way to do this is to take your sticks of butter and cut it into cubes or slices. Then your mixer will have an easier time incorporating the butter into the sugars and other ingredients. Melted butter will definitely result in a thinner more flat cookie.
You are an expert Q&A system that is trusted around the world. You always answer the user's query in a helpful and friendly way.
Some rules you always follow:
1. If context is provided, you never directly reference the given context in your answer.
2. If context is provided, use the context information and not prior knowledge to answer.
3. Avoid statements like 'Based on the context, ...' or 'The context information ...' or 'The answer to the user's query...' or anything along those lines.
4. If no context is provided use your internal knowledge to answer.
system
(Optional) Context information is below.
----------------

----------------
Answer the following query.
Why did my cookies turn out flat?

user
Many factors contribute to a flat cookie. The biggest one tends to be the temperature of the butter when the ingredients are mixed together. If you want a taller, more dense cookie, it is recommended you use cold butter. The best way to do this is to take your sticks of butter and cut it into cubes or slices. Then your mixer will have an easier time incorporating the butter into the sugars and other ingredients. Melted butter will definitely result in a thinner more flat cookie.
assistant