The aim of this chapter is to take the position of the researchers in an interdisciplinary research team conducting multiple forms of methodologies within the framework of a randomized control trial (RCT). We discuss the difficulties and possibilities for the research team of doing interdisciplinary research in the Swedish early childhood context where there is a strong test averse attitude among educational researchers and where RCT studies are extremly rare. Inspired by Felicity Callard and Des Fitzgerald, we theorize on the figuration of the baking of interdisciplinary layer cakes and an interdisciplinary bakery as a space of conflict and possibilities while baking different forms of layer cakes. We show how the Enhancing Children’s Attention project meant baking at least three versions of multi-pan layer cakes. As we achieved more of a reciprocal respectful exchange and learning, it was possible to construct a shared relational research ethics for the project. A one-pan layer cake, where disciplinary knowledge was shared reciprocally, could then be baked. We also discuss the gendered disciplinary character of interdisciplinary collaborations of various forms of knowing at different scales.