"As an added bonus" seems quite casual. Is there a word or phrase that expresses it that is suitable in a 'serious' essay? For example, "… Thus, equations give us scientific knowledge. As an added bonus, equations are easier to use than their alternatives."
Learn English – more formal way to say, “As an added bonus”
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Best Answer
"As an additional benefit" should work in most contexts. It just substitutes "additional" for the possibly-less-formal "added", and "benefit" for the definitely-less-formal "bonus". You can also go in-between in formality by using "as an added benefit".