Almond Cookies (Low Carb)

Almond Cookies (low carb). Ingredients:
1 + 1/8C flour (optional: can replace 1/3C flour with 1/3C almond flour)
(Optional) 1TBS corn starch [you can skip it]
1/4 tsp baking powder
1/4 tsp baking soda
Pinch salt
1/4C sugar (or use only 3TBS)
1/2C almond meal + 1/3C finely chopped almond (or use 1/2C+1/3C almond meal total)
2TBS melted butter (optional: replace melted butter with oil)
5TBS oil
3/4 egg white

Topping
Egg wash: 1 egg yolk + 1/4 egg white
Chopped walnut, slivered almonds or sliced almonds