First break the eggs, add sugar and mix well, then pour in salad oil and mix well. Pour in milk and mix well.
Then mix the instant coffee with water and mix well, then sift the low-gluten flour and baking soda, use a spatula to gently mix from different directions.
Next, pour in the walnuts and mix well. Prepare the baking sheet and pour the batter into the paper cup until it's seven full.
Finally, put it in the preheated oven, adjust the temperature to 170 degrees, and bake for 20 minutes.