Orange Kiss-Me Cake

This was a favorite childhood cake. My mom prepared the orange mixture in her meat grinder, but I'm pretty sure this will work in a food processor or blender.
The recipe calls for shortening but vegetable oil will probably work, too.
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From: Momma
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Cake Batter
1 large orange
1 cup seedless raisins
1/3 cup walnuts
2 cups sifted flour
1 cup sugar
1 teaspoon baking soda
1 teaspoon salt
½ cup shortening (vegetable oil will probably work instead)
1 cup milk
2 unbeaten eggs
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Topping
1/3 cup orange juice
1/3 cup sugar
1 teaspoon cinnamon
¼ cup chopped walnuts
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• Preheat oven to 350°.
• Grease and flour a 13x9 pan.
• Juice orange and reserve 1/3 cup juice for topping. Discard seeds.
• Grind the pulp and rind of the orange along with the raisins and 1/3 cup walnuts. If you do this in  a meat grinder, use the coarse blade. This can also be done in a food processor or blender.
• Sift together the flour, sugar, baking soda, and salt into a large bowl.

When I looked online, for the next step, most other recipes said to just dump in the remaining batter ingredients and mix for 3 minutes. My mom was a bit more exact; she said:

• Add the shortening and ¾ cup milk. Beat 1 to 2 minutes.
• Add the eggs and ¼ cup milk. Beat 1½ minutes.
• Fold in the orange-raisin-nut mixture.
• Turn batter into the greased pan. Bake 40 to 50 minutes.
• Meanwhile, mix the cinnamon, sugar and walnuts in a small bowl and set aside for later.
• Remove cake from oven. Drizzle the orange juice over the warm cake. Sprinkle top with the sugar-cinnamon-nut mixture.