Background: Nutrition knowledge and confidence can be key facilitators to good nutrition behaviours. This study aimed to evaluate the impact of a structured and personalisable recipe-based nutrition education resource, on sports nutrition knowledge and confidence among women football players. Fifty-two women football players across different competitive levels (tiers two and four of the English league and academy players) completed a survey assessing training and nutrition habits, nutrition confidence, and sports nutrition knowledge. A sample of participants were randomized into an intervention group (n = 10), receiving a resource with practical applications and personalisable meal adaptations, or a control group (n = 8) receiving theoretical guidance without recipes (both two weeks). Both groups then repeated the same survey at the end of the two-week period. Results: In the initial survey fewer than half of the players (40%) regularly planned their meals ahead of time, but the majority planned what (71%) and when (73%) they ate in relation to training and competition most of the time. More than half had at least some responsibility for doing the grocery shopping (67%) and preparing and cooking meals (90%), highlighting an opportunity to intervene. Results demonstrated that while the intervention significantly improved nutrition knowledge compared to control (p = 0.004), the overall score was still low (< 50% for both groups), and the change was within the typical error for the measure. Nutrition confidence was also low, with no significant differences between groups. Conclusions: This short home-based intervention had a statistical but unlikely meaningful impact on nutrition knowledge, but not confidence. These findings are considered alongside the participants’ nutrition habits, and discussed in the context of self-determination theory to highlight the potential role of relatedness to improve competence and autonomy, and subsequently knowledge and confidence.