To prepare a wacky buckwheat spice cake recipe, first you'll need to gather your ingredients. First, you will need the following ingredients: 1 cup (240 milliliters) butter, 1 tablespoon (2.5 ml) cinnamon, 1/2 teaspoon (0.04 tsp) ground allspice, 1/4 teaspoon nutmeg, 2 tablespoons (60 g) rolled oats, and 1 teaspoon of kosher salt. You can find these ingredients at your local grocery store. Then, add the wet ingredients to the dry ingredients and mix until everything is well combined. Pour the batter into the greased and floured cake pan and bake in the oven for 35 to 40 minutes. Allow the cake to cool before removing it from the pan.