Add all wet ingredients ( almond butter, coconut sugar, maple syrup, vanilla extract, chia seeds ) to a bowl and mix everything using a spatula or whisk. Make sure to no lumps are formed.
To the same bowl add dry ingredients ( rolled oats, almond flour, baking powder, salt ) and mix with wet ingredients. The dough might turn a little hard to work with a spatula now, use your hands if needed.
Add chocolate chips, sliced almonds, and try to fold in.
Transfer to a parchment-lined brownie pan ( 8 by 8 ) and level out.
Add extra chocolate and sliced almonds on top if needed.
Bake at 350F for 30 mins. Let cool and slice bars.
Warm the bar in the microwave for 10-15 secs before serving as it may be hardened when cooled. If you prefer it hard, then enjoy it as it is!
Storage: can store in an air-tight container on a counter-top for up to a week and for 2-3 weeks in the refrigerator.