RICHMOND – Before “Is It Cake?” reached TV screens, Elyssa Cervantes, 13; and her mother, Angela Davis, had people asking the same question. The mother-daughter team creates delicious-looking and aromatically accurate desserts and drinks – a few being cheesecake, sundaes and daiquiris – from wax. People at the counter during the Mushroom Festival delight in the aromas and Lane Smith, 5, Orrick, must be persuaded not to eat a piece from what looks and smells like a bowl of Fruit Loops. “We make them ourselves,” Cervantes says. “We actually use essential oils and it’s made in my chemistry class. I’m homeschooled.” “She’s learning ratios,” Davis says. “It’s five essential oils and how much she would need with 1 pound of wax.” They mix colored oils to produce the desired effect for each soy-blend candle creation. In addition to higher math, working at the family business – Happiness In a Jar Candle Co., Fayetteville, Arkansas – provides Cervantes with hands-on applications for other…