5-Minute Strawberry Shortcake In A Jar (Low Carb, Gluten-free) - This healthy strawberry shortcake in a jar comes together in just five minutes. Make the 2-minute vanilla mug cake, then build the layers. Low carb and gluten-free, with a paleo option. | Wholesome Yum - Natural, gluten-free, low carb recipes. 10 ingredients or less.