Background and Context: A continued gender disparity has driven a need for effective interventions for recruiting girls to computer science. Prior research has demonstrated that middle school girls hold beliefs and attitudes that keep them from learning computer science, which can be mitigated through classroom design. Objective: This study investigated whether programming environment design has a similar effect, to assess the potential utility of block-based programming (Scratch) for recruiting girls to computer science compared to traditional text-based programming (Python). Method: One hundred and eighty-seven upper elementary and middle school students were surveyed to understand stereotype concern, sense of belonging, interest, and self-efficacy at baseline and after being shown each programming environment. Findings: Results indicated that stereotype concern was high for girls across all three conditions. Significantly more girls than boys showed interest in learning computer science in Scratch compared to Python. Belonging, interest, and self-efficacy were inter-correlated for both genders. Implications: Although girls demonstrated low self-efficacy across all conditions, more girls showed interest in learning to program through Scratch. Additionally, both girls and boys demonstrated higher self-efficacy in Scratch than in Python. This suggests that using block-based programming languages may be effective for recruiting girls to study computer science.