Pumpkin cake with cinnamon frosting

Ingredients:
For the cake:
1 1/2 cups all-purpose flour
1 tsp baking soda
1/2 tsp baking powder
1 1/2 tsp ground cinnamon
1/2 tsp ground nutmeg
1/4 tsp ground ginger
1/4 tsp salt
1/2 cup pumpkin puree (canned or homemade)
1/2 cup vegetable oil (or melted coconut oil)
1/2 cup brown sugar (or coconut sugar)
1/4 cup maple syrup or agave syrup
1/2 cup unsweetened almond milk (or any non-dairy milk)
1 tsp vanilla extract
1 tbsp apple cider vinegar (helps activate the baking soda)
For the Cinnamon Frosting:
1/2 cup vegan butter (softened)
2 cups powdered sugar
2 tbsp non-dairy milk (more if needed)
1 tsp ground cinnamon
1/2 tsp vanilla extract
Pinch of salt
Instructions:

1. Preheat and Prepare:
   Preheat your oven to 350°F (175°C).
   Grease and line an 8-inch round cake pan (or two smaller pans if you prefer layered cake).
2. Prepare the Dry Ingredients:
   In a large bowl, whisk together the flour, baking soda, baking powder, cinnamon, nutmeg, ginger, and salt. Set aside.
3. Mix the Wet Ingredients:
   In another bowl, combine the pumpkin puree, oil, brown sugar, maple syrup, almond milk, vanilla extract, and apple cider vinegar. Whisk until smooth.
4. Combine Wet and Dry Ingredients:
   Add the wet ingredients to the dry ingredients and stir until fully combined. The batter will be slightly thick, but smooth.
5. Bake the Cake:
   Pour the batter into your prepared cake pan(s) and spread it out evenly.
   Bake for 30-35 minutes (for an 8-inch pan) or until a toothpick inserted into the center comes out clean.
   Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
6. Make the Cinnamon Frosting:
   While the cake is cooling, make the frosting. In a mixing bowl, beat the softened vegan butter until creamy.
   Gradually add in the powdered sugar, one tablespoon at a time, and beat until smooth.
   Add the cinnamon, vanilla extract, and a pinch of salt. Gradually add the non-dairy milk to reach a creamy, spreadable consistency. Adjust sweetness or cinnamon to taste.
7. Frost the Cake:
   Once the cake is completely cool, spread the cinnamon frosting over the top. If you made two layers, spread frosting between the layers as well.