With the adoption of the Common Core Standards and a renewed emphasis on critical and higher-order thinking skills, exploring the relationship among writing development, self-efficacy beliefs, perseverance, and effort has become essential. The nature of writing workshop not only lends itself to differentiation among students but also provides opportunities to explore authentic texts and tasks. The purpose of this qualitative, multicase study was to explore the development of kindergarten writers within a writing workshop. Research questions focused on writer identity, writing self-efficacy, and growth as kindergarten writers. The participants, two female and one male, were randomly chosen for this study and attended an all-day, 3-days per-week kindergarten program at a public school in the upper Midwest. Student writing interviews, videotaped student-teacher conferences, and student written work served as data sources. The writing workshop framework provided a learning environment that was conducive to the formation of the three children's writing identities. As students engaged in writing mini-lessons, text inquiries, writing, and sharing writing with peers, student writing stamina and engagement increased. Students utilized techniques and strategies of published writers. Students adopted these qualities in their views of themselves as writers. Suggestions for future research included exploring writing self-efficacy in relation to everyday kindergarten experiences, allowing for sharing and feedback, and addressing the ways in which writing workshop might provide for authentic and rigorous instruction and tasks in kindergarten classrooms.