If building an investment portfolio is like making a meal, growth stocks would be the spice. Hot and volatile, the right growth stocks can add some zest to your portfolio. But just like the real thing, the wrong growth stocks can turn a well-balanced portfolio into an unsavory disaster.

So, let's look at three growth stocks that get the balance right -- tangy but not overwhelming: Tesla (NASDAQ: TSLA), The Trade Desk (NASDAQ: TTD), and Costco Wholesale (NASDAQ: COST).

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Source Fool.com