Using a wooden spoon, mix together pumpkin puree, eggs, butter, and sugar. Stir until smooth. Add baking powder, baking soda (Omit powder and soda if using Bluebird’s Einkorn Baking Mix), salt, cinnamon, nutmeg, ginger, cardamom, and clove. Stir well. Add Einkorn flour and flaxseed meal (if using) and stir until well incorporated and the batter is smooth.
Spread batter into a well-greased loaf pan (8 1/2 in x 4 1/2 in). Bake for 1 hour and 15 minutes, or until a toothpick inserted in the center of the loaf comes out clean. Remove from pan and cool on a rack. Wait 15 minutes before slicing.