This study examined and compared the nutritional quality and degree of naturalness between baby biscuits (<3 years), children biscuits (>3 years), and adult biscuits. Mintel's Global New Products Database was searched for “Baby Biscuits & Rusks” and “Sweet Biscuits/Cookies” (re)launched between July 2019 and July 2022 in four European countries (Germany, the Netherlands, Spain, and the United Kingdom), which resulted in 1280 products to be analyzed. Nutritional quality was measured by means of nutrient values per 100 g, and baby biscuits were assessed for compliance with the World Health Organization's latest Nutrient and Promotion Profile Model (NPPM). Degree of naturalness was measured using the food naturalness index (FNI). Baby biscuits had the best nutritional quality and were the most natural as compared to children and adult biscuits, but their energy density and sugar content require further attention. Nutritional quality was comparably poor in children and adult biscuits, and children biscuits were the least natural of the three groups. The NPPM requirements of not adding any free sugar at all to baby biscuits may drive parents to purchase alternative sweeter biscuits originally formulated and meant for children and adults. Reasonable regulations are needed to support product (re)formulations and to improve the current market food offer for babies and children.