McDonald's is about to change your Egg McMuffin game and flip your entire world upside-down.

The fast food chain will be swapping liquid margarine for real butter in its English muffins, biscuits, and bagels, which means your classic Egg McMuffin won't be the same ever again.

The change was prompted by McDonald's struggle to keep up with consumer demand for natural ingredients. In March, they announced they would no longer use chickens that had been given human antibiotics, and it now sells milk without rBST, an artificial hormone.

Q2 earnings and revenues were down for the seventh consecutive time, despite those changes.

You'll also soon be able to get your butter fix later in the day - McDonald's announced Tuesday it will begin serving all-day breakfast on October 6.

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