The global failure to phase out fossil fuels lies at the heart of the climate crisis. Feminist climate activists have long supported the development of a Fossil Fuel Treaty, arguing that continued reliance on fossil fuels sustains systems of patriarchy, colonialism, militarism, and exploitation. Governments committed to a Feminist Foreign Policy must therefore adopt policies grounded in intersectional and transformative feminist principles that challenge these structures rather than reinforce them. This policy brief argues that holistic Feminist Foreign Policies should be inherently linked to a Fossil Fuel Treaty, offering policymakers insight into why supporting a Treaty is a core component of FFP while providing feminists with a framework to hold FFP-endorsing governments accountable for pursuing a foreign climate policy that genuinely practices feminist values.